Quantity: 2 pack. Color: Black Material: PVC, Plastic, Stainless steel Total height: Wheel diameter: 203 mm/ 8 inch Wheel thickness: 33 mm/ 1.3 inch Screw diameter: 11.7 mm/ 0.46" Screw length: 25 mm/ 1 inch Feature: The front wheel replacement is made of PVC, has strong load bearing capacity The wheelchair front wheel provides silent and smooth rolling and optimum shock absorption even on bumpy roads. It is easy and convenient to install the wheels with screws and wheel forks included Application: These castors are compatible with most wheelchairs, transport chairs, drive rollators, knee scooters, and walkers. Note: All dimensions are measured manually and there may be small deviations