Features 1、PU Material: The wheel is made of environmentally friendly PU material, non slip and wear resistant, and can be used for a long time. 2、Large Load Bearing: The thickness of the wheel hub is 40mm, and the thicker design makes it have strong load bearing capacity. 3、608ZZ Ball Bearing: Using 608ZZ metal ball bearings, the solid wheel runs smoothly and is safer to use. 4、6in Diameter: The wheelchair solid wheel with 6in large diameter ensures quick moving and great stability. 5、Multiple Usages: The 5 hole wheel hub is suitable for wheelchairs, rollators, walkers, etc., easy to install and replace. Specification Item Type: 6in Solid Wheel Material: PU Material Diameter: Approx. 150mm / 6in Tire Thickness: Approx. 25mm / 1in Wheel Hub Thickness: 40mm / 1.6in Bearing Model: 608ZZ Bearing Hole Diameter: Approx. 8mm / 0.3in Bearing Outer Diameter: Approx. 22mm / 0.9in Bearing Thickness: Approx. 7mm / 0.3in (There may be small error in manual measurement.) Package List 1 x Wheelchair Wheel