Efficient VXB005C100CPU makes it feasible to pull and push items instead of transport Dia. Measured of the caster wheel in metric standard 100mm which is equal to 3.937" inch with imperial units. Sizes of the caster wheel is 50mm (1.969" inch). The caster dimensions heightwise is 150mm/5.906" inch. Top Plate is the method of installing the caster to your equipment, dimensions are 115mm x 100mm x 6mm with the holes distance of 72mm x 85mm. This caster wheel core made of Cast Iron and Polyurethane and has a Cast Iron and Polyurethane tire spinning over Roller bearing. Maximum load calpacity that could not be exceeded on each wheel, remember to add safety factor, when calculating the load capacity 661 lb with a Swivel type. The Temperature range is -40 to 180 F. FYI, you will need to buy the VXB005C100CPU in order to get one :).