Zhejiang Yongfeng Powder Metallurgy Co. Ltd. is a professional powder metallurgy company, which is a large multiple-producing enterprise with a history of more than20 years, in 2001, we passed ISO-9001: 2000 Quality Management System Verification as one time. Our staple: Powder Metallurgy Oil Bearing, Valve guide, Gear , mechanical parts, automobile parts, connecting rod, Structure Unit ect.. The materials are of copper base, iron base and copper & iron base. We have also enjoyed the support and aids from friends of the same trade at home and abroad, industrial and commercial circles and financial circles.