You need 8inch-Swivel-Caster-031 to have your office desk, equipment or even a machine to easily roll them around. Diameter of the caster wheel is a metric standard 200mm that is equal to 7.874" inch with imperial units. Dimensions of the caster wheel is 45mm (1.772" inch). The caster dimensions heightwise is 240mm/9.449" inch. This wheel caster can be mounted using a Top Plate with the dimensions of 115mm x 110mm x 6mm and holes distance of 72mm x 85mm. The caster core is made of Polypropylene and has a Polypropylene tire with a low friction Double ball beaing. Each caster will carry the load of 661 lb and is Swivel type. Last and not least the temperature range = -40 to 180 F. Buy the 8inch-Swivel-Caster-031 now, just add the quantity to basket and click on Checkout.