Whatever you are building needed to be on wheels, here come the 42mm-Swivel-Caster-003. Diameter of the caster wheel is a metric standard 42mm that is equal to 1.654" inch with imperial units. Dimensions of the caster wheel is 42mm (1.654" 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 34mm x 34mm and holes distance of 129mm x 74mm. Low drag was achieved by a Nylon core on a Nylon tire spinning freely with a Roller bearing. Each caster will carry the load of 55 lb and is Swivel type. The temperature range is -40 to 180 F. Remember, you will have to buy the 42mm-Swivel-Caster-003 in order to have it :).