● Castor: Pressed steel fixed castor, heavy duty brackets, with top plate fitting ● Brackets: Made of pressed steel. Bolted wheel axle. Zinc-plated, blue-passivated, Cr6-free. ● Wheels: Heavy duty wheel with Blickle Extrathane® polyurethane tread, with aluminium wheel centre ● Tread/Tyres: Made of high-quality, reaction-injected polyurethane-elastomer Blickle Extrathane®, low-noise operation, low rolling resistance, good floor preservation, very high abrasion resistance, high cut and tear propagation resistance, very good chemical connection with the wheel centre. ● Wheel centre/Rim: Made of die-cast aluminium. Casted tread.