Heavy weight capability and Durability made the wheel casters like the VXB20050HLB a must use, get your do it yourself object move around. And rolling on wheel that has 50mm diameter/1.969" inch. The wheel has a width of 50mm=1.969" inch. Overall height of the wheel caster is 62mm = 2.441" inch. Top Plate is the method of installing the caster to your equipment, here are the dimensions 42mm x 42mm with the holes distance of 129mm x 74mm. The Roller bearing design will enable the Polyurethane tire to roll easily with a core made of Polyurethane. Each caster will carry the load of 66 lb and is Swivel and Upper Brake type. Environment temperature range is -40 to 180 F. Buy our VXB20050HLB, we wish all the best.