... certificated 2.Good abrasion resistance&hardness 3.High precision 4.Oem offered 5.Powder metal high precision gear Nantong Guanda Powder Metallurgy Co., ... spread out all over the the country, and we supply components to Korea, America and japan. Our products are ... gear,helical gear,powder metallurgy gear,sleeve,copper sleeve,sleeve bearing, bushing, bush,pulley,timing pulley,structural parts,powder ...