This swivel frame castor (part no. S4032) uses a nylon 100mm wheel. The top load capacity of the S4032 is 200kg. The swivel castor uses plain bearings for wheel rotation and is plate mount. This castor can be also purchased with a brake (part number S4032B). The swivel frame permits the load to be steered. The wheel diameter is 100mm, the wheel overall width is 35mm and you can order separately (See NY401).