Tens of thousands of different kinds to select from to have your office Desk/chair sliding easily right and left, install the VXB20050CPUT1. Diameter size of the caster wheel has a metric standard 50mm which is equal to 1.969" inch with imperial units. The thickness of the wheel is 50mm or 1.969" inch. The caster dimensions heightwise is 48mm/1.890" inch. This wheel caster can be mounted using a with the dimensions of 38mm x 38mm and holes distance of 129mm x 74mm. Low drag was achieved by a Nylon and Polyvinyl Chloride core on a Nylon and Polyvinyl Chloride tire spinning freely with a Roller bearing. Maximum load calpacity that should not be exceeded on each wheel, remember to add safety factor, when calculating the load capacity 55 lb with a Swivel type. Temperature range is -40 to 180 F. Buy the VXB20050CPUT1 now, just add the quantity to basket and click on Checkout.