Moves large items quicker using the VXB004125CPU. Diameter size of the caster wheel has a metric standard 125mm which is equal to 4.921" inch with imperial units. The thickness of the wheel is 32mm or 1.260" inch. The Caster with the wheel from end to end is 156mm = 6.142" 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. This caster wheel core material is Iron and Polyurethane and has a Iron and Polyurethane tire spinning over Double ball bearing. Each caster will carry the load of 331 lb and is Swivel type. The caster temperature range = -40 to 180 F. Very important notice, you need to buy the VXB004125CPU in order to get one :).