Tens of thousands of different kinds to select from to have your office Desk/chair sliding easily right and left, install the VXB005150WCF. And rolling on wheel that has 150mm diameter/5.906" inch. The thickness of the wheel is 50mm or 1.969" inch. Overall height of the wheel caster is 190mm = 7.480" inch. Mounted via a Top Plate that has the size of 115mm x 100mm x 5.5mm and the holes distance of 72mm x 85mm. The weehl core material is Cast Iron and has a Cast Iron tire with a low friction Roller bearing. Each caster will carry the load of 661 lb and is Fixed type. The caster temperature range = -40 to 180 F. Buy our VXB005150WCF, we wish all the best.