Heavy weight capability and Durability made the wheel casters like the VXB011100SSPU a must use, get your do it yourself object move around. And rolling on wheel that has 100mm diameter/3.937" inch. The thickness of the wheel is 50mm or 1.969" inch. Overall height of the wheel caster 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. This caster wheel core material is Stainless steel fork and Polyurethane and has a Stainless steel fork and Polyurethane 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 441 lb with a Swivel type. Environment temperature range is -40 to 180 F. Buy our VXB011100SSPU, we wish all the best.