Heavy weight capability and Durability made the wheel casters like the VXB005200BLTPRF 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 dimensions heightwise is 240mm/9.449" 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 Thermoplastic Rubber and has a Thermoplastic Rubber tire spinning over Double ball beaing. Maximum load calpacity that should not be exceeded on each wheel, remember to add safety factor, when calculating the load capacity 661 lb with a Fixed type. The caster temperature range = -40 to 180 F. Very important notice, you need to buy the VXB005200BLTPRF in order to get one :).