You need 10inch-Caster-002 to have your office desk, equipment or even a machine to easily roll them around. This wheel caster has a wheel diameter of 250mm or 9.843" inch in inches. The wheel has a width of 75mm=2.953" inch. The caster dimensions heightwise is 320mm/12.598" inch. Top Plate is the method of installing the caster to your equipment, the dimensions are 200mm x 153mm Top Plate: 14mm+housing: 10mm with the holes distance of 160mm x 90mm. Rolling with a wheel core material of Cast iron polyurethane and a Cast iron polyurethane tire rolled over Precision double ball bearing. Each caster will carry the load of 3307 lb and is Fixed type. Temperature range = -40 to 180 F. Remember, you will have to buy the 10inch-Caster-002 in order to have it :).