This castor from Richmond Wheel and Castor Co. is manufactured with a rigid frame and is fitted with a rebound rubber 100mm wheel. This castors stock code is R4043. This castors max capacity is 150kg. The rigid castor is assembled with ball bearings on the castors axle and is baseplate mount. This castors rigid frame is ideal for linear movement however steering can be achieved by using with swivel castors. The diameter of the wheel is 100mm, the wheel overall width is 35mm and you can order separately (See RR4077).