Stainless steel swivel castor with top plate bracket made of pressed steel with double row ball race in swivel head (material no. 1.4301/AISI 304), with dust protection ring.Wheel with electrically conductive thermoplastic polyurethane (TPU) chemically bonded on nylon centre. Hardness of tread: 94\u00C2\u00B0 shore A . Leak resistance <10\u00E2\u00B4\u00CE\u00A9.Bolted wheel axle.Low rolling resistance and operating noise. Good floor preservation and non-marking.Very good chemical resistance to many substances.Can be equipped with a separate 1-way directional lock, part no. 568048.