Tens of thousands of different kinds to select from to have your office Desk/chair sliding easily right and left, install the VXB018-40F/S. And rolling on wheel that has 40mm diameter/1.575" inch. The wheel has a width of 40mm=1.575" inch. The Caster with the wheel from end to end is 75mm = 2.953" inch. This wheel caster can be mounted using a Top Plate with the dimensions of 55mm x 55mm x 3mm and holes distance of 42mm x 42mm. This caster wheel core material is aluminum alloy and Nylon and has a aluminum alloy and Nylon tire spinning over Ball bearing. Each caster will carry the load of 110 lb and is type. Temperature range is -40 to 180 F. Buy our VXB018-40F/S, we wish all the best.