Thousands of different kinds using our Canada based business to select from to have your office Desk/chair sliding easily right and left, install the VXB018-60F/S. Wheel dia. is 50mm or 1.969" inch in inches. The wheel has a width of 50mm=1.969" inch. The caster dimensions heightwise is 85mm/3.346" inch. This wheel mounting is Top Plate with the dimensions of 73mm x 73mm x 5mm and holes distance of 58mm x 58mm. This caster wheel core made of aluminum alloy and Nylon and has a aluminum alloy and Nylon tire spinning over Ball bearing. Having in mind that every caster wheel has the load capacity of 551 lb with a type. The caster wheel temperature range = -40 to 180 F. FYI, you will need to buy the VXB018-60F/S in order to get one :).