Heavy weight capability and Durability made the wheel casters like the VXB00512550BNYB1 a must use, get your do it yourself object move around. Diameter size of the caster wheel has a metric standard 125mm which is equal to 4.921" inch with imperial units. Dimensions of the caster wheel is 50mm (1.969" inch). Overall height of the wheel caster is 164mm = 6.457" inch. Top Plate is the method of installing the caster to your equipment, here are the dimensions 115mm x 110mm x 6mm with the holes distance of 72mm x 85mm. The Double ball beaing design will enable the Polyamide (Nylon) tire to roll easily with a core made of Polyamide (Nylon). Each caster will carry the load of 1543 lb and is Side Brake type. Temperature range is -40 to 180 F. Buy our VXB00512550BNYB1, we wish all the best.