Whatever you are building needed to be on wheels, here come the 4inch-Swivel-Caster-024. This wheel caster has a wheel diameter of 100mm or 3.937" inch in inches. The wheel has a width of 75mm=2.953" inch. The Caster with the wheel from end to end is 165mm = 6.496" inch. This wheel caster can be mounted using a Top Plate with the dimensions of 200mm x 153mm Top Plate: 14mm+housing: 10mm and holes distance of 160mm x 90mm. The caster core is made of Cast iron polyurethane and has a Cast iron polyurethane tire with a low friction Precision double ball bearing. Each caster will carry the load of 2205 lb and is Swivel type. The temperature range is -40 to 180 F. Remember, you will have to buy the 4inch-Swivel-Caster-024 in order to have it :).