Heavy weight capability and Durability made the wheel casters like the VXB005125BTPR 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 thickness of the wheel is 50mm or 1.969" inch. The caster dimensions heightwise is 166mm/6.535" 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 Thermoplastic Rubber core on a Thermoplastic Rubber tire spinning freely with a Double ball beaing. Each caster will carry the load of 507 lb and is Swivel type. Temperature range is -40 to 180 F. Buy the VXB005125BTPR now, just add the quantity to basket and click on Checkout.