2 pcs Front Wheelchair Wheel Solid Wheel Replacement for Wheelchairs Rollators Walkers 4 Inch Replacement front wheels for wheelchairs. This wheelchair caster is made of PVC (polyvinyl chloride), which has puncture resistance and abrasion resistance. This feature makes the wheelchair suitable for the elderly and safe for indoor and outdoor use. The spare front wheel is very easy to install on an elderly wheelchair: just insert the wheel into the bottom of the frame and screw the screws into the appropriate holes. Technical features: Wheel diameter : 10cm 4in Wheel thickness : 2.4cm (1 inch) Bearing hole: 8 mm (0.3 inch) Package Contents : 2 x wheelchair casters Colour : Green Black Installation instructions: the installation screws must be tightened, and the wheel must be able to rotate but not shake -Notice: 1. Due to manual measurement, please allow an error of 3 mm. Please make sure you don't mind before buying. 2. Due to the difference of different monitors, the picture may not reflect the actual color of the item. Thanks! 3.If you have any questions, please feel free to contact us.Material: Wheelchair tires are made of high-quality rubber materials, PU wheels, no inflation, not afraid of sticking, Anti-slip texture, firm grip, sturdy and durable, wear-resistant, labor-saving and practical. Made to last : Each wheel is made from a strong, durable material made to perform under constant, intense pressure and won't crack, go flat or scuff over time. The wheel for wheelchair is suitable for most wheelchairs, wonderful replacement accessory, perfect for elders, patients wheelchair front tyres, mobility scooter, disabled vehicles, healthcare vehicles, etc. Excellent workmanship, noiseless, sturdy and durable, can rotate 360 degrees, high hardness, high uniformity, Metal ball bearing, strong and durable, light rotation, long service life. The package contains: 1 pair (2 pieces) of 4 in 10 cm solid PU wheels, no need to inflate, not afraid of tying, with a complete set of shafts, Wheel thickness: 2.4cm 1in, the bearing hole is 8mm.