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 VXB013150WBCPUB. Dia. Measured of the caster wheel in metric standard 150mm which is equal to 5.906" inch with imperial units. Sizes of the caster wheel is 50mm (1.969" inch). The caster dimensions heightwise is 222mm/8.740" inch. Mounted via a Top Plate that has a size of 140mm x 108mm and the holes distance of 105mm x 75mm. Low drag was achieved by a Polyurethane and Cast iron core core on a Polyurethane and Cast iron core tire spinning freely with a Ball bearing. Each caster wheel will carry the load of 661 lb and is Swivel and Upper Brake type. The Temperature range is -40 to 180 F. FYI, you will need to buy the VXB013150WBCPUB in order to get one :).