Mounting the 6inch-Lock-Caster-002 Wheel Caster can make your life easier, push or pull your new project on wheels. Diameter of the caster wheel is a metric standard 150mm that is equal to 5.906" inch with imperial units. The wheel has a width of 50mm=1.969" inch. The Caster with the wheel from end to end is 195mm = 7.677" inch. Top Plate is the method of installing the caster to your equipment, the dimensions are 100mm x 115mm with the holes distance of 75mm x 85mm. Rolling with a wheel core material of Polyurethane and a Polyurethane tire rolled over Double ball beaing. Each caster will carry the load of 617 lb and is Side Locking type. The temperature range is -40 to 180 F. Remember, you will have to buy the 6inch-Lock-Caster-002 in order to have it :).