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 VXB005150BLTPRF. Dia. Measured of the caster wheel in metric standard 150mm which is equal to 5.906" inch with imperial units. The thickness of the wheel is 50mm or 1.969" inch. The height of the wheel caster is 195mm = 7.677" inch. This wheel mounting is Top Plate with the dimensions of 100mm x 115mm and holes distance of 75mm x 85mm. The Double ball beaing design will enable the Thermoplastic Rubber tire to roll easily with a core made of Thermoplastic Rubber. Each caster wheel will carry the load of 617 lb and is Fixed type. The Temperature range is -40 to 180 F. FYI, you will need to buy the VXB005150BLTPRF in order to get one :).