... hardness&density 3.high precision 4.oem offered 5.professional clutch part Nantong Runfeng Powder Metallurgy Co., Ltd. is specializing ... products spread out all over the the country, and we supply components to Korea, America and japan. Our products are ... sleeve,sleeve bearing, bushing, bush,pulley,timing pulley,structural parts,powder metallurgy parts,clutch parts,nut,auto parts,rotor and stator etc.