The features are Muvtons Premium Polyurethane treaded wheels 933 Shore A, firmly bonded to precision machined cast iron cores offer low rolling resistance, smooth & noiseless running, are non-marking and floor protective. These wheels possess high abrasion & cut resistance and are resistant to tearing. Tested & Guaranteed against bond failures. Wheel Bearing Options: Sealed precision ball bearings, tapered roller bearings or roller bearings. Colour: Light Brown. Temperature range: -20 C to +85 C. Tread Options: Anti-static: conductive wheels are available.