The S4148B by Richmond Wheel and Castor Co. is a swivel frame castor and has a rebound polyurethane wheel. This swivel castor is in our stainless steel excel bolt range and can hold loads up to 150kg. The S4148B is assembled with stainless steel roller bearings on the castors axle and is mounted with a bolt. The swivel frame of this castor allows the castor to swivel 360. The diameter of the rebound polyurethane wheel is 100mm, the wheel width is 35mm and you can order separately (Part Number: RP4072). This model can also be ordered without a brake (part number S4148).