Mounting VXB20050BPP2T 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 dimensions heightwise is 48mm/1.890" inch. Mounted via a that has a size of 38mm x 38mm and the holes distance of 129mm x 74mm. The Roller bearing design will enable the Polypropylene tire to roll easily with a core made of Polypropylene. Having in mind that every caster wheel has the load capacity of 77 lb with a Swivel type. The caster wheel temperature range = -40 to 180 F. FYI, you will need to buy the VXB20050BPP2T in order to get one :).