Mounting VXB20050NYB is the economoical solution of building project to move around by pushing or pulling. Spinning on wheel that has 50mm diameter/1.969" inch. The wheel has a width of 50mm=1.969" inch. The Caster with the wheel from end to end is 62mm = 2.441" inch. Top Plate is the method of installing the caster to your equipment, dimensions are 34mm x 34mm with the holes distance of 129mm x 74mm. This caster wheel core made of Nylon and has a Nylon tire spinning over Roller bearing. Having in mind that every caster wheel has the load capacity of 66 lb with a Swivel and Upper Brake type. Ambient temperature range is -40 to 180 F. FYI, you will need to buy the VXB20050NYB in order to get one :).