You need 5inch-Lock-Swivel-Caster-022 to have your office desk, equipment or even a machine to easily roll them around. Diameter of the caster wheel is a metric standard 125mm that is equal to 4.921" inch with imperial units. The wheel has a width of 32mm=1.260" inch. The overall height of the caster is 156mm or 6.142" inch. This wheel caster can be mounted using a Top Plate with the dimensions of 93mm x 62mm and holes distance of 45mm x 72mm. The Double ball bearing design will enable the Iron and Polyurethane tire to roll easily with a core made of Iron and Polyurethane. Bearing in mind that every caster wheel has the load capacity of 331 lb with a Swivel and Upper Locking type. Temperature range = -40 to 180 F. Remember, you will have to buy the 5inch-Lock-Swivel-Caster-022 in order to have it :).