Halifax or Vancouver our Low priced answert to the heavy weight objects movement, Wheel casters like our VXB005C200CPU will be rolling your machine or equipment back and forth. Dia. Measured of the caster wheel in metric standard 200mm which is equal to 7.874" inch with imperial units. The wheel has a width of 50mm=1.969" inch. The caster dimensions heightwise is 250mm/9.843" inch. Mounted via a Top Plate that has a size of 115mm x 100mm x 6mm and the holes distance of 72mm x 85mm. The weehl core material is Cast Iron and Polyurethane and has a Cast Iron and Polyurethane tire with a low friction Roller bearing. Maximum load calpacity that could not be exceeded on each wheel, remember to add safety factor, when calculating the load capacity 1190 lb with a Swivel type. The caster wheel temperature range = -40 to 180 F. FYI, you will need to buy the VXB005C200CPU in order to get one :).