This castor from Richmond is designed with a swivel frame and has a polyurethane 100mm wheel. This castors stock code is S4044. 200kg is the maximum load capacity for the S4044. The swivel castor is assembled with roller bearings on the castors axle and is mounted with the baseplate. To order this castor with a brake, see S4044B. The swivel frame allows full swivel rotation to enable steering. The outside diameter of the wheel is 100mm, the wheel overall width is 35mm and can be purchased separately (PU4408).