Heavy weight capability and Durability made the wheel casters like the VXB005100C a must use, get your do it yourself object move around. Diameter size of the caster wheel has a metric standard 100mm which is equal to 3.937" inch with imperial units. The thickness of the wheel is 50mm or 1.969" inch. The caster dimensions heightwise is 142mm/5.591" inch. Top Plate is the method of installing the caster to your equipment, here are the dimensions 100mm x 115mm with the holes distance of 75mm x 85mm. The Roller bearing design will enable the Cast iron tire to roll easily with a core made of Cast iron. Each caster will carry the load of 441 lb and is Swivel type. The caster temperature range = -40 to 180 F. Very important notice, you need to buy the VXB005100C in order to get one :).