Heavy weight capability and Durability made the wheel casters like the VXB004100RB 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 35mm or 1.378" inch. The caster dimensions heightwise is 130mm/5.118" inch. Top Plate is the method of installing the caster to your equipment, here are the dimensions 93mm x 62mm with the holes distance of 45mm x 72mm. The Ball bearing design will enable the Rubber tire to roll easily with a core made of Rubber. Each caster will carry the load of 154 lb and is Swivel type. The caster temperature range = -40 to 180 F. Very important notice, you need to buy the VXB004100RB in order to get one :).