... resistance&hardness 3.high precision 4.good strength 5.sintered metal Nantong Runfeng Powder Metallurgy Co., Ltd. is ... specializing in powder metallurgy,oil bearings,structural parts,gears(sprockets) and different parts used in automobile and motorcycle.our company ... sleeve,sleeve bearing, bushing, bush,pulley,timing pulley,sintered metal,powder metallurgy parts,nut,auto parts,rotor and stator etc.