Heavy weight capability and Durability made the wheel casters like the VXB00520050BNY a must use, get your do it yourself object move around. Diameter size of the caster wheel has a metric standard 200mm which is equal to 7.874" inch with imperial units. The wheel has a width of 50mm=1.969" inch. The Caster with the wheel from end to end is 240mm = 9.449" inch. This wheel caster can be mounted using a Top Plate with the dimensions of 115mm x 110mm x 6mm and holes distance of 72mm x 85mm. This caster wheel core material is Polyamide (Nylon) and has a Polyamide (Nylon) tire spinning over Double ball beaing. Each caster will carry the load of 1543 lb and is Swivel type. Environment temperature range is -40 to 180 F. Buy our VXB00520050BNY, we wish all the best.