Tens of thousands of different kinds to select from to have your office Desk/chair sliding easily right and left, install the VXB005100HPUB1. Diameter size of the caster wheel has a metric standard 100mm which is equal to 3.937" inch with imperial units. The wheel has a width of 50mm=1.969" inch. Overall height of the wheel caster is 142mm = 5.591" inch. This wheel caster can be mounted using a Top Plate with the dimensions of 100mm x 115mm and holes distance of 75mm x 85mm. This caster wheel core material is Polyurethane and has a Polyurethane tire spinning over Double ball beaing. Bearing in mind that every caster wheel has the load capacity of 441 lb with a Side brake type. The caster temperature range = -40 to 180 F. Very important notice, you need to buy the VXB005100HPUB1 in order to get one :).