Minimization of possible untoward effects on operator by installing VXB005125CPU just ask your operator to push and pull, but not carry. 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). The caster dimensions heightwise is 167mm/6.575" 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 Iron core and Polyurethane and has a Iron core and Polyurethane tire spinning over Double ball beaing. Each caster will carry the load of 882 lb and is Swivel type. Temperature range is -40 to 180 F. Very important notice, you need to buy the VXB005125CPU in order to get one :).