Dong-Yen Grinding Wheel Material Co., Ltd. specializes in manufacturing polishing centerless grinding wheels, surface polishing water-proof grinding wheels , all types products are perfect water-proof and oil-proof to guarantee the hardness and sharpness of the grinding surface during the process. Ra<0.02um Grit:60#~3000#Application:aluminum materials,gravure printing roll,copper materials,stainless-steel materials,all kind of precision polishing parts