Halifax or Vancouver our Low priced answert to the heavy weight objects movement, Wheel casters like our VXB009A7550PUB will be rolling your machine or equipment back and forth. Wheel dia. is 75mm or 2.953" inch in inches. The thickness of the wheel is 50mm or 1.969" inch. The height of the wheel caster is 110mm = 4.331" inch. This wheel mounting is Top Plate with the dimensions of 100mm x 115mm and holes distance of 75mm x 85mm. Low drag was achieved by a Polyurethane and Iron core on a Polyurethane and Iron tire spinning freely with a Ball bearing. Each caster wheel will carry the load of 1102 lb and is Swivel and Upper Brake type. The Temperature range is -40 to 180 F. FYI, you will need to buy the VXB009A7550PUB in order to get one :).