Heavy weight capability and Durability made the wheel casters like the VXB005125BLPPF a must use, get your do it yourself object move around. Diameter size of the caster wheel has a metric standard 125mm which is equal to 4.921" inch with imperial units. The wheel has a width of 50mm=1.969" inch. Overall height of the wheel caster is 167mm = 6.575" inch. Mounted via a Top Plate that has the size of 100mm x 115mm and the holes distance of 75mm x 85mm. Low drag was achieved by a Polypropylene core on a Polypropylene tire spinning freely with a Double ball beaing. Maximum load calpacity that should not be exceeded on each wheel, remember to add safety factor, when calculating the load capacity 507 lb with a Fixed type. The caster temperature range = -40 to 180 F. Very important notice, you need to buy the VXB005125BLPPF in order to get one :).