You need 2inch-Swivel-Caster-017 to have your office desk, equipment or even a machine to easily roll them around. This wheel caster has a wheel diameter of 50mm or 1.969" inch in inches. The wheel has a width of 50mm=1.969" inch. The Caster with the wheel from end to end is 48mm = 1.890" inch. This wheel caster can be mounted using a with the dimensions of 34mm x 34mm and holes distance of 129mm x 74mm. The Roller bearing design will enable the Nylon tire to roll easily with a core made of Nylon. Each caster will carry the load of 66 lb and is Swivel type. The temperature range is -40 to 180 F. Remember, you will have to buy the 2inch-Swivel-Caster-017 in order to have it :).