... hardness 3.High precision 4.Oem offered 5.Powder metal high precision gear Nantong Guanda Powder Metallurgy Co., Ltd ... specializing in powder metallurgy,oil bearings,structural parts,gears(sprockets) and different parts used in automobile and motorcycle.our company ... bearing, bushing, bush,pulley,timing pulley,structural parts,powder metal parts,nut,auto parts,sintered parts,rotor and stator etc.