2″ wide by 6″ diameter caster assembly, ideal for lighter-duty trailers. This makes moving your trailer much simpler by allowing the trailer to move and roll in multiple directions without having to be attached a vehicle. The 1200 lb. capacity caster assembly fits on 2″ jack inner tube, and can be easily removed for travel with the included pin. Wheel bracket has a corrosion resistant zinc finish.This product fits on to 2″ inner tube diameter round jacks.