1、PREMIUM MATERIAL: Universal PU wheels, PVC solid wheels, wear resistant and shock absorbing. Steel bearings, anti skid, strong and has a long service life. 2、EFFORT SAVING AND SMOOTHLY OPERATION: The wheel runs smoothly and has good driving stability on a flat surface. Will not lose control or slip without reason, and even wheelchair users can easily operate it. 3、THICKENED WHEEL HUB: Stable support, thickened PU wheel hub with strong load bearing capacity (120KG), smoothly rolling, and safe use. 4、WIDE APPLICATION: Widely used for elderly people with limited mobility, disabled vehicles, medical vehicles, etc. Compatible with most wheelchairs, walkers, grocery carts, scooters, or other replacement accessories with 6 inch wheels. 5、EASY TO INSTALL: Manufactured in standard size, the tire can be easily installed on your vehicle, choose with confidence! Item Type: Wheelchair Tire Material: PU, PVC, Stainless Steel Specification: Approx. 6in / 15.24cm Wheel Thickness: Approx. 47mm / 1.85in Inner Diameter of Center Hole: Approx. 8mm / 0.31in Center Hole Spacing: Approx. 59mm / 2.32in 1 x Wheel