Features PU, ALLOY STEEL STRUCTURE: Universal PU wheels that are wear resistant and shock absorbing. Steel support frame that is sturdy and has a long lifespan. EFFORTLESS AND SMOOTHLY OPERATION: The wheels run smoothly and have excellent driving stability on flat surfaces. They do not lose control or slip, making them easy to operate even for wheelchair users. THICKENED WHEEL HUB: Provides stable support and the thickened PU wheel hub has a strong load bearing capacity (250LBS), ensuring smoothly rolling and safe use. WIDE APPLICATION: Universal PU caster wheel is widely used in vehicles for the elderly, disabled individuals, medical vehicles, etc. IDEAL REPLACEMENT: This 6in caster wheel is compatible with most wheelchairs, walkers, shopping carts, scooters, or other 6 inch wheel replacements. Specification: Item Type: Caster Wheel Material: PU, Alloy Steel Wheel Diameter: Approx. 6in / 15.24cm Color: Black  Package List:1 x Caster Wheel Package List 1 x Caster Wheel