... cold-roller steel yokeLoading capacity: 300kg,350kg,400kg,450kgWheel diameter: 100mm,125mm,160mm,200mmBearing: roller bearingSteel thickness: 4x3x4mmPlate: double ball racewaysFinish ... ,etc.3.brake:without brake4.suitable scope: factory,warehouse shelf, heavy-duty appliance, etc. 2010 new heavy-duty castor