Used Schunk Gfs 25-180 Universalschwenkfinger 355510 + Ina Hk2516-2Rs Nadellager for sale (21,154)

Condition: ready for operation (used), Wittenstein alpha SP 180X-MC1-7-0M1-2K planetary gearbox, serial number as per photo, used, normal signs of use, 100% functional, scope of delivery as per photos Ljdpfsxtwdksx Anceaa

Condition: new, Long Belt Grinding Machine LMD2500 incl. Deburring Tool - NEW - Delivery time on request Ledpfxsg I Ipko Anceaa The LMD 2500 is a long belt machine with a flexible abrasive belt that allows the processing of flat surfaces as well as corners or material edges. This machine is ideal for machining irregular shapes, removing welds and deburring and rounding laser cut parts. The flexible and and motorized height-adjustable table is perfect when, due to large dimensions, the workpiece to be machined cannot be easily moved. With the LMD2500, take advantage of the adaptability of the long belt along with different sanding tools such as sanding shoe, manual pad, and deburring brush - or disc - to finish the areas you need. - Grinding flat surfaces with the contact roller. - Stroke finishing with flat pad - Grinding of weld seams - Deburring of laser cut parts - Processing of large surfaces - Interchangeable finishing tools - Flexible deburring/edge rounding station - Pneumatic belt tensioning - Tool carrier with counterweight system - Contact roller tool - Flat tool - Manual pad 100*80mm - Abrasive belt variable speed (8-25m/s) - Edge rounding tool - Including: o Deburring disc holder Ø150mm medium SH hardness o Grinding disc Ø150mm g120 ceramic with velcro support x5 o Surface finishing disc Ø150mm with Velcro backing o Edge

Condition: used, Year of construction: 2020, functionality: fully functional, For sale: Metal Stamping Press ALP-25C (25T, 2020) Laodpfoxmwniex Ancoa Condition: Virtually unused, like new. Manufacturer: JINAOLAN Machinery (China) Model: ALP-25C Year of manufacture: 2020-11 A compact and reliable mechanical eccentric stamping press designed for forming, punching, and stamping various metal parts. Technical specifications: Nominal capacity: 25 T Stroke: 45 mm Stroke rate: 145 strokes/min (SPM) Max. die height: 180 mm Height adjustment: 35 mm Ram working area: 170 × 150 mm Bolster area: 370 × 240 mm Country of origin: China Applications: The ALP-25C press is suitable for: stamping, cutting, bending, and forming metal parts; small pressing operations in tool, metal structure, and automotive parts manufacturing; working with thin and medium-gauge sheet metal. If you have any further questions, please feel free to contact us.

Condition: new, Year of construction: 2021, functionality: fully functional, For sale: Metal Stamping Press JINAOLAN ALP-25V (25T, 2021) Condition: Brand new, never used, original packaging. We use several of these presses in our factory—photos show those units. Two brand new units available. Manufacturer: JINAOLAN Machinery (China) Model: ALP-25V Year of Manufacture: 2021 Modern CNC-controlled eccentric press designed for forming, stamping, and punching various metal components. The press is equipped with a high-level operator safety system (Laser Safe), ensuring maximum operational safety. Technical Specifications: - Rated Capacity: 25 tons Ljdpfoxniw Sox Ancoaa - Stroke Rate: 60–140 strokes/min (SPM) - Stroke Length: 60 mm - Max Die Height: 200 mm - Die Height Adjustment: 50 mm - Slide Area: 470 × 245 mm - Bolster Area: 680 × 300 mm - Main Motor: 2.2 × 4 kW - Max Air Pressure: 0.51 MPa - Max Tool Weight: 0.30 t - Control: CNC (programmable control unit) - Safety System: Laser Safe – two-hand control system Application: This press is suitable for stamping, punching, bending, and forming metal parts. Thanks to CNC control and precision mechanics, the machine ensures high productivity, repeatability, and safety. Ideal for small and medium-sized manufacturing, metal component, and forming part production. Advantages: - Completely new, factory-sealed equipment - CNC control: precise and user-friendly programming - Laser Safe system: press can be lowered only when both hand controls are activated (two-hand safety) - Reduces risk of injury, complies with stringent safety standards - Robust construction and stable eccentric drive - 2 brand new presses in stock + several used units in operation If you have further questions, we are happy to answer them.

Condition: used, Riva Calzoni Hydromotor MR350/350/46852 250bar – removed from Ferromatik MV 200-970 - taken from a running machine - fully functional Manufacturer: Riva Calzoni Type: MR350/350/46852 Laedpfx Anew Ah Riscea Spare part no.: 10098158

Condition: ready for operation (used), Year of construction: 1988, operating hours: 1,234 h, functionality: fully functional, machine/vehicle number: ET1 2589, The machine is for polishing chairs or similar. We have polished Wisch bones chairs. Laodjwwg Txjpfx Ancea We have 2 machines for sale.

Year of construction: 1997, condition: excellent (used), Universal Turning key drawing machine from Cardinal apply for toolmaker , mold maker, education and Locksmith Slot width 3 - 100 mm max. groove length 1250 mm Pulling force 6000 kg Draw length 1250mm Motor 5,5 KW Weight 1650 kg Lasdpoin Dkzefx Ancea Dimensions 1000x1650x1000mm

Condition: used, INATEC BS 25002 PUR is a machine manufactured by INATEC. Currently stored in Germany, it is a PUR adhesive unit in good condition with a maximum system output of 7.5 kW and over-temperature protection up to 170????C. The delivery terms are FCA. Equipment: as is Good condition Overtemperature protection max. 170??C Plant power max. 7.5 kW Lodovfxu Sjpfx Ancoaa PUR gluing unit

Condition: ready for operation (used), Year of construction: 1991, machine/vehicle number: 1204197, functionality: fully functional, pressing force: 125 t, stroke length: 120 mm, table width: 700 mm, table length: 1,100 mm, hole diameter: 52 mm, ram adjustment: 100 mm, No reserve price - guaranteed sale to the highest bidder! Placing a bid obligates you to collect the item within the specified period from 23.06.2026 to 26.06.2026! TECHNICAL DETAILS Press force: 1,250 kN Speed range: 30 - 250 rpm Ram stroke: 8 - 120 mm Ram adjustment: 0 - 100 mm Lasdsy D Nnljpfx Ancja Ram bore diameter: 52 mm Table dimensions: 1,100 x 700 mm MACHINE DETAILS Controller manufacturer: UNIDOR Drive power: 35 kW Dimensions & Weight Dimensions (L x W x H): 6,000 x 2,400 x 3,300 mm Machine weight: 12,000 kg EQUIPMENT Decoiler, diameter approx. 1,200 mm Workshop drawer cabinet with clamping devices External reference: 68

Condition: excellent (used), CATALOG NUMBER 72133 TECHNICAL DATA - Maximum cutting height: 180 mm - Track width: 400 mm - Shaft width: 370 mm - Shaft diameter: 60 mm - Maximum blade diameter: 300 mm - Blade bore diameter: 80 mm - Minimum workpiece length: 630 mm - Maximum workpiece width: 600 mm From above: - Pneumatic hold-down - Pawls - 2 metal pressure rollers - Pawls - Saw shaft - Smooth pressure roller Lasdoyr Rmqspfx Ancsa - Pawls - Smooth pressure roller From below: - 2 metal, toothed feed rollers - Pawls - Track - Saw shaft - Track - Stepless feed speed adjustment via inverter - Main motors 2x55 kW - Feed motor 4 kW - Hydraulic lifting of the top/bottom frame - Hydraulic adjustment of saw shafts - Pump motor 0.37 kW - Central lubrication - Suction connector diameter: 1x300 mm, 1x380 mm - Dimensions (LxWxH): 3200x2350x2000 mm - Weight approx. 5500 kg ADVANTAGES – Italian manufacture – Double-shaft – Used multi-blade saw, in very good condition Net price: PLN 238,900 Net price: EUR 56,880 Net price calculated at an exchange rate of 4.2 PLN/EUR (Price may change with significant exchange rate fluctuations)

Condition: excellent (used), Catalogue number: 7649 TECHNICAL DATA Infeed width: 900 mm Infeed height: 300 mm Shaft width: 1030 mm Shaft diameter: 700 mm Knife length: 1030 mm Number of knives: 3 pcs Screen dimensions: 70x70 mm Below: 2 toothed feed shafts Lajdpfxsx S Nawj Ancja Lower shaft motor: 7.5 kW Above: 2 toothed feed shafts Upper shaft motor: 7.5 kW Belt conveyor feeder Redler chain conveyor 5600 mm + 10600 mm, 2.2 kW Feeder belt width: 800 mm Main motor: 90 kW Reverse function Overall machine dimensions (L/W/H): 3300x3100x1700 mm Base for chipper dimensions: 3300x2080x1940 mm Feeder / Redler dimensions (L/W/H): 5600x900x1000 mm + 10600x1050x1600 mm Base for feeder belt dimensions: 5100x1300x2520 mm Total weight approx.: 16,000 kg ADVANTAGES – German-made – Redler-type chain conveyor equipped with scrapers – Reverse function – DTR technical documentation – Used chipper, in very good condition Net price: 258,900 PLN Net price: 61,640 EUR (according to exchange rate 4.2 EUR) (Prices may change with significant exchange rate fluctuations)

Condition: excellent (used), For sale: Professional fire-fighting pump METZ TS 8/8 manufactured by METZ Feuerwehrgeräte GmbH Karlsruhe. The equipment is in very good visual and technical condition and comes from a fire brigade unit. The pump is powered by a Volkswagen type 122 engine with 25 kW output, renowned for its durability and ease of maintenance. A significant advantage is its low operating hours—approximately 66 hours, which is exceptionally low for equipment of this type. Technical specifications • Manufacturer: METZ Feuerwehrgeräte GmbH • Model: TS 8/8 • Standard: DIN 14410 • Year of manufacture: 1989 • Engine: Volkswagen type 122 • Engine power: 25 kW • Displacement: 1192 cm³ Lodpfx Aeyt H R Usnceaa • Pump capacity: 800 l/min at 8 bar • Operating weight: approx. 190 kg • Hour meter: approx. 66 hours Equipment • Pressure and vacuum gauge • Hour meter • Work lights • Firefighting quick couplings • Transport frame • Choke and throttle control Application • Volunteer and professional fire brigades • Water transfer from ponds, rivers, and wells • Agricultural operations • Fire-protection systems • Dewatering and water management duties Robust German engineering—very durable and easy to service.

Condition: ready for operation (used), functionality: fully functional, In this offer you purchase a used colour production system ‘Xerox Versant 180 Press’ Object of sale: 1 x Xerox Versant 180 with the following equipment: Lsdpfxju Ra Sme Ancsaa incl. Fiery Server EX180 incl. Paperdeck A-CF03 incl. Booklet Finisher A-FN13 Not the right equipment? It is no problem to configure the machine according to your wishes. Please feel free to contact us! Counter readings: Total: Approx. 4,419,328 pages Colour: Approx. 3,524,210 pages Black: Approx. 895,118 pages Condition: This offer is a used device, which may show signs of use (minor scratches or yellowing). (minor scratches or yellowing). The device has been tested for function A test printout can be seen in the photo Packaging and dispatch: You are welcome to view the device during our business hours. Please make an appointment for this! Seaworthy packaging and worldwide shipping available on request! A function test will be recorded on video for you before dispatch or collection. For further information, you can of course also contact us personally.

Condition: used, mileage: 71,100 km, power: 295 kW (401.09 HP), fuel type: gasoline, gearing type: automatic, first registration: 02/2017, emission class: euro6, color: white, number of seats: 3, Equipment: ABS, air conditioning, all wheel drive, central locking, electronic stability program (ESP), * DODGE RAM 2500 4x4 with original 71,800 km - Petrol - no LPG - new TÜV (inspection) - truck registration - * 5.7L petrol engine - displacement: 5,654 cm³ - 295 kW / 401 hp - Euro 6 - green emissions sticker - * VIN: 3C6TR5DT6GG236296 - German vehicle documents - second owner - * Trailer hitch with 3,500 kg towing capacity (braked) - 750 kg unbraked - * Vehicle available immediately - vehicle is wrapped in green vinyl - original color is white - * This is not an accident import vehicle - vehicle is verifiably accident-free - * Please schedule an appointment for viewing - * Contact: Mr. Andreas Vogel * The information provided online is non-binding and for description purposes only. * They do not constitute guaranteed characteristics. Lsdsyg T E Sjpfx Ancsaa * The seller is not liable for typographical or data transmission errors. * Subject to changes, errors, and prior sale.

Condition: new, functionality: fully functional, empty load weight: 235 kg, maximum load weight: 1,115 kg, overall weight: 1,350 kg, axle configuration: 1 axle, loading space length: 2,550 mm, loading space width: 1,330 mm, loading space height: 430 mm, maximum speed: 100 km/h, trailer brake: trailer braked, Year of construction: 2026, SARIS MP 255 133 1350 2 NEW VEHICLE Internal dimensions: 255 cm x 133 cm Side wall height incl. railing: 43 cm Loading platform height: 52 cm Gross vehicle weight: 1,350 kg Payload: 1,115 kg Braked single-axle low loader Overrun brake and handbrake from KNOTT 1,350 kg axle with brake Low chassis Fully-welded hot-dip galvanized steel frame Aluminium profile side panels Steel railing Rear panel foldable and removable with tension lock 15 mm thick, non-slip, heavy-duty phenolic plywood floor Jockey wheel 6 lashing eyes, each with 400 kg tensile force 14" reinforced commercial-grade tyres 2x wheel chocks M+S tyres Net/rope hooks on frame Laedpfxsgrqy Ao Ancja 13-pin plug Front position lights Rear lamps with reversing light, fog lamp, and triangular reflector OPTIONAL ACCESSORIES – PERMANENTLY REDUCED PRICES STARTING FEBRUARY 2026 - 100 km/h equipment (shock absorbers) - Spare wheel with holder - Folding and removable front wall - Loading ramps - SARIS alloy wheels - Full LED lighting - Anti-theft lock - Fine- or coarse-mesh net - H-rack - Mesh sides in different heights, also enclosed - Flat cover with or without hoops - High cover, 150 cm or 180 cm - Rear supports Further accessories available on request! Plus shipping to Gera and vehicle documents: €100 net Images are for reference only and may display accessories subject to additional charges. Haven't found the right trailer yet? We have 50-100 vehicles in stock, ready for immediate collection. Our workshop is open Monday to Friday from 8:00 am to 5:00 pm for all types of repairs. Specialist in axle repairs, including for caravans. Large range of rental trailers available. Additionally, we have a large range of spare parts and accessories for trailers of all brands. Call us for advice, visit our website, or stop by in person.

Condition: like new (used), Generally overhauled machine Price: 4.000EUR Dough mixer Manufacturer: Diosna With paddle Stainless steel bowl Volume: 180 liters Dimensions: 90x95x135cm Laodpox N Egbofx Ancoa Electric power: 3.5kW Voltage: 380V 50Hz

Condition: used, functionality: fully functional, Year of construction: 2018, operating hours: 867 h, load capacity: 2,500 kg, lifting height: 4,700 mm, free lift: 1,085 mm, fuel type: gas, mast type: triplex, construction height: 2,145 mm, power: 41 kW (55.74 HP), fork carriage width: 1,000 mm, fork length: 1,200 mm, total length: 2,560 mm, drive type: Treibgas, construction width: 1,150 mm, LPG Forklift Load Centre: 500 mm Fork Width: 100 mm Fork Thickness: 40 mm ISO Class: ISO Class 2 = 1,000 - 2,500 kg Mast Type: Triplex Transmission: Torque converter / Automatic Condition: Operational and fully functional Technical Condition: Very good Laedpoxvt H Tofx Ancsa Front Tyre Type: Superelastic Front Tyre Size: 7.00-12 Front Tyre Condition: 80 - 100% Rear Tyre Type: Superelastic Rear Tyre Size: 6.00-9 Rear Tyre Condition: 80 - 100% Description: Maintenance and safety inspection (UVV) renewed on delivery. Drive and hydraulic oil replaced. Machine in excellent condition with original 830 operating hours. Photos show the current condition of the unit. Sideshift, Fork positioner. Additional attachments such as fork positioner or similar are optionally available. 3rd valve, 4th valve, front working lights, load guard, full free lift, CE certificate, beacon. Fully enclosed cabin with heating available at extra cost.

Condition: excellent (used), machine/vehicle number: VF642ACA000000889, mileage: 236,894 km, power: 189 kW (256.97 HP), first registration: 12/2000, fuel type: diesel, fuel: diesel, color: white, driver cabin: day cab, gearing type: mechanical, Year of construction: 2000, Equipment: ABS, air conditioning, electric window regulation, power mirror, = Additional options and accessories = - PTO - Radio/Cassette player - Radio/CD player - Speed limiter - Toolbox = Remarks = VF642ACA00000889 = More information = Empty weight: 5.280 kg Carrying capacity: 4.720 kg GVW: 10.000 kg Technical condition: very good Ljdpfsymrfqox Ancoaa Visual appearance: very good = Dealer information = Do you have any questions or suggestions? Please feel free to contact us. We guarantee a response within 8 hours.Prices do not include VAT.No rights may be derived from the information provided.Office phone number: Mobile: Dutch - English - German - French - Spanish - Italian) Available via WhatsApp and Viber.Mobile: Available via WhatsApp and Viber.When paying by bank transfer, the funds must be transferred to our bank account listed below. Always verify the payment details on our website. Please contact us if you have received different information.If in doubt, please call us so we can verify the invoice and/or payment.Bank details: Bank name: ING Bank address: Bijlmerdreef 106 1102 CT Amsterdam IBAN number: NL97INGB0117176699 EORI/VAT/TAX: NL810574901B(01) BIC/SWIFT: INGBNL2A

Year of construction: 2026, condition: new, functionality: fully functional, Technical data: Working width: 2540 mm Lodpeytparofx Ancjaa Maximum sheet thickness: 2.5 mm Maximum bending angle: 135° Length: 2880 mm Width: 1020 mm Height: 1450 mm Weight: 1300 kg Delivery to the customer is possible. The delivery cost is determined individually according to the quotation of the transport company. If you are interested in other machines, we encourage you to visit our website.

Condition: new, Year of construction: 2025, machine/vehicle number: CAT000C9VLX905057, fuel type: diesel, power: 200 kW (271.92 HP), motor manufacturer: Caterpillar C9, General information Field of application: Construction Weights Empty weight: 2.859 kg Functional Generator capacity: 250 kVA CE mark: yes Other information Fuel consumption: 40.3 Liter / Hour at 75% Load Generator: Caterpillar LC5114H Frequency: 50 Voltage: 400 Drill equipment: Tank, Battery, Control Panel, Steel canopy Water tank volume: 500 l Transport dimensions (LxWxH): 3,981x1,41x2,032 Laodpfx Anoukm Rnocsa Additional information Please contact Kenny Bongers, Tijmen Pesselse, Arjen van Dijk or Ronald van der Laar for more information = Additional options and accessories = - Battery - Control Panel - Steel canopy - Tank

Condition: used, mileage: 495,662 km, power: 315 kW (428.28 HP), axle configuration: 6x2, color: silver, driver cabin: day cab, gearing type: automatic, suspension: air, Year of construction: 2018, Equipment: ABS, EBS, air conditioning, For vehicle inquiries, Mr. Seidel will assist you (by phone). Laedpey Adbksfx Ancoa Mercedes-Benz Actros 2543 L 6x2 Flatbed with Rear Crane Body: Palfinger PK 18002 EH Axle: Narrow wheel mounting track, Front axle 7.5 t, front axle, cranked design; Rear axle with 440 crown wheel, hypoid, 13.0 t, active lubrication, controlled; trailing axle 7.5 t, steered, unloadable, liftable; axle ratio i = 2.611. Electronic braking system with ABS and ASR, electronic air supply unit (medium), heating, disc brakes on front and rear axle, condensation monitoring for compressed air system, trailer brake (2-line). Wheelbase: 5,200 mm; rear overhang: 2,250 mm. Steering: single-circuit, non-regulated steering pump; stabilizer front axle, additional stabilizer rear/trailing axle. Rear underrun protection (ECE), front underrun protection (ECE, aluminum), rear axle mudguard, 2,550 mm vehicle width, 3-part mudguards with EC splash protection front and rear, aerodynamic underbody paneling. Interior: Smoker’s package, compressed air connection in cab, driver’s air-suspension seat (comfort), co-driver functional seat, seat backrest release, comfort bed top (wide, adjustable), comfort bed bottom with PremiumComfort mattress, velour seat covers, curtain across bed(s), driver’s side sunblind, electric auxiliary air conditioning, automatic climate control, residual heat utilization, additional hot water heater for cab, enhanced insulation, drawers under bed, overhead compartments above windshield, electric roof hatch. 2x 12V/220Ah low-maintenance batteries, regulated generator 24-30V/100A, circuit breakers, voltage converter 24V/12V 10A, 12V/15A connection point for additional consumers, 24V/15A socket passenger side footwell. PSM, Superstructure CAN, ISO 11898 instead of 11992, hill start assist, speed limiter 30 km/h, night driving light switch, 24V 15-pin trailer socket, remote control for air suspension, mirror trim, road vehicle, L-cab StreamSpace (2.50 m), flat floor, cab width 2.50 m, cab mounting height 765 mm, comfort cab suspension with steel springs, manual-hydraulic cab tilt device, left exterior storage compartment/lid, transparent external sun visor, A-pillar cover, tinted windshield with sunband, heated front mirror, air horn, plastic corner bumper, central bumper with towing eyes, door extension, left/right cab entry fixed, central locking system, comfort lock system. Transmission: G 211-12/14.93-1.0, Mercedes PowerShift 3, air suspension rear axle, instrument cluster 12.7 cm with additional displays, digital tachograph with extra recording function (VDO), Multimedia Radio Touch, 2-way speaker system, Truck Data Center 6 (DTCO), CB radio pre-installation (12V, DIN slot), toll pre-equipment, Truck Data Center 6 (DTCO) pre-equipment. Tanks: Main tank left, 630 l (aluminum, 650 x 700 x 1600 mm), AdBlue tank 60 l left, lockable tanks. Lighting: fog lamps, LED daytime running lights, LED taillights, work lights rear cab. Engine: OM470, inline 6, 10.7 l, 315 kW (428 hp), 2,100 Nm; Euro VI OBD-C engine version, high-performance engine brake, two-stage fuel-optimized air compressor, radiator louver, regulated water pump, angled air intake integrated into cab, ...

Condition: used, first registration: 07/2016, IVECO 180E25, Year 2016, grey color, 59,200 km, Euro 6, wheelbase 3690 mm, ZF automatic transmission, air conditioning, rear camera, differential lock, equipped with new MEC 18-ton hooklift system with slewing, hydraulic container locking, vertical roller, hydraulic system prepared for crane body. Lsdpfxoxf A Hno Ancoaa

Condition: excellent (used), For sale: Professional measuring set from the Japanese company Mitutoyo, model SBM-25CXST (cat. no. 568-925). This set is designed for precision measurement of hole diameters and cylindrical parts in the range from 12 to 25 mm. Set contents: Mitutoyo ABSOLUTE Digimatic digital bore gauge with LCD display; Three measuring heads: 12–16 mm, 16–20 mm, 20–25 mm; Setting rings: Mitutoyo 19.997 mm and HK66 19.001 mm; Extension rods and additional accessories; Original Mitutoyo wooden case with custom foam insert. The ABSOLUTE system ensures stable measurements and no need for re-zeroing every time the device is switched on. Digital readout provides quick and reliable measurements with high accuracy. The set is in very good condition, complete and ready for use. Ideal for measurement laboratories, quality control, and tool workshops. Lsdpfow R E Hvex Anceaa

Condition: good (used), functionality: fully functional, Year of construction: 2015, operating hours: 6,098 h, load capacity: 2,500 kg, lifting height: 4,760 mm, free lift: 1,500 mm, fuel type: electric, mast type: triplex, construction height: 2,350 mm, battery manufacturer: Baden Batterie, remaining battery capacity: 70 %, battery voltage: 80 V, fork length: 1,010 mm, color: red, Equipment: UVV, lighting, sideshift, Description & special equipment: Incl. charger, good tyres, very good battery with 70% capacity, sideshift, half-cab (ideal for outdoor use), front windscreen, work lights, 3 valves. Ljdpfx Aneyzy Ecocoaa Remark: The forklift is in very good condition. The machine is currently located at our site in Bad Krozingen. For an additional charge, transportation of the machine to your location can be arranged. An invoice with VAT shown will be sent to the buyer and the stated prices are net.

Condition: used, functionality: fully functional, Price with dismantling. Drysorter with control system Mitsubishi A2. Drysorter capacity 80 pc/min after rebuild 2021 new control system Siemens S7 1500, ABB580 frequency converters and Finscan 2019 automatic sorter. Drysorter equipped with Dynagrade 2015 (updated 2020). Ledpfx Ajyzhvvsncjaa