Heavy weight capability and Durability made the wheel casters like the VXB005C150CPUB3 a must use, get your do it yourself object move around. Diameter size of the caster wheel has a metric standard 150mm which is equal to 5.906" inch with imperial units. The wheel has a width of 50mm=1.969" inch. The caster dimensions heightwise is 200mm/7.874" inch. This wheel caster can be mounted using a Top Plate with the dimensions of 115mm x 100mm x 6mm and holes distance of 72mm x 85mm. This caster wheel core material is Cast Iron and Polyurethane and has a Cast Iron and Polyurethane tire spinning over Roller bearing. Maximum load calpacity that should not be exceeded on each wheel, remember to add safety factor, when calculating the load capacity 992 lb with a Swivel and Upper Brake type. The caster temperature range = -40 to 180 F. Very important notice, you need to buy the VXB005C150CPUB3 in order to get one :).