Whatever you are building needed to be on wheels, here come the 3inch-Caster-009. Diameter of the caster wheel is a metric standard 75mm that is equal to 2.953" inch with imperial units. Dimensions of the caster wheel is 75mm (2.953" inch). The Caster with the wheel from end to end is 120mm = 4.724" inch. This wheel caster can be mounted using a Top Plate with the dimensions of 95mm x 95mm x 6mm and holes distance of 70mm x 70mm. The caster core is made of aluminum alloy and Nylon and has a aluminum alloy and Nylon tire with a low friction Ball bearing. Here come the maximum load that should be applied on every wheel, remember to add safety factor, when calculating the load capacity 2205 lb with a type. Temperature range = -40 to 180 F. Remember, you will have to buy the 3inch-Caster-009 in order to have it :).