Mounting the 40mm-Swivel-Caster-005 Wheel Caster can make your life easier, push or pull your new project on wheels. This caster is rolled on a wheel that has 40mm diameter/1.575" inch inches. The thickness of the wheel is 40mm or 1.575" inch. The overall height of the caster is 38mm or 1.496" inch. This wheel caster can be mounted using a with the dimensions of 38mm x 38mm and holes distance of 129mm x 74mm. The Roller bearing design will enable the Polypropylene tire to roll easily with a core made of Polypropylene. Here come the maximum load that should be applied on every wheel, remember to add safety factor, when calculating the load capacity 55 lb with a Swivel type. Temperature range = -40 to 180 F. Remember, you will have to buy the 40mm-Swivel-Caster-005 in order to have it :).