Heavy weight capability and Durability made the wheel casters like the VXB005150ACPUB1 a must use, get your do it yourself object move around from our Toronto biz. Dia. Measured of the caster wheel in metric standard 150mm which is equal to 5.906" inch with imperial units. The thickness of the wheel is 50mm or 1.969" inch. The Caster with the wheel from end to end is 193mm = 7.598" inch. This wheel mounting is Top Plate with the dimensions of 100mm x 115mm and holes distance of 75mm x 85mm. The weehl core material is Iron core and Polyurethane and has a Iron core and Polyurethane tire with a low friction Double ball beaing. Having in mind that every caster wheel has the load capacity of 772 lb with a Swivel and Center Brake type. The caster wheel temperature range = -40 to 180 F. FYI, you will need to buy the VXB005150ACPUB1 in order to get one :).