VXB005100CRB1 is a device comprising a wheel that's connected to the base of a huge object like a trailers, your home furniture, even your truck to transfer the item more quickly and readily. them.You need {Item Name} to have your office desk, equipment or even a machine to easily roll them around. And rolling on wheel that has 100mm diameter/3.937" inch. The wheel has a width of 50mm=1.969" inch. The Caster with the wheel from end to end is 142mm = 5.591" inch. Top Plate is the method of installing the caster to your equipment, here are the dimensions 100mm x 115mm with the holes distance of 75mm x 85mm. The weehl core material is Rubber and has a Rubber tire with a low friction Roller bearing. Bearing in mind that every caster wheel has the load capacity of 441 lb with a Side brake type. Environment temperature range is -40 to 180 F. Very important notice, you need to buy the VXB005100CRB1 in order to get one :).