Swivel castor, housing made of pressed steel, bright zinc plated, blue passivated, double ball bearing swivel head, wheel axle with nut, bolt hole. Wheel centre made of Polypropylene, Tread: TENTEprene (thermoplastic rubber), grey non-marking, precision ball bearing , with threadguards Castors can be mounted with standard screws; various length screws can be used.
