Ningbo Shuanghai Machinery Manufacturing Co., Ltd., known for its machine capabilities, professional and talented staff, management experience, and superior production conditions, is a manufacturing company that specializes in precision castings and sewing machine parts. 



Our precision castings adhere to the national standards of China's GB, America's ASTM, Japan's JIS, and Germany's DIN to produce various precision castings. These castings are made from carbon steel, alloy steel, stainless steel, gray cast iron, and nodular cast iron. The annual throughput is 600 tons, and the products are mainly sold to the United States, Germany, Britain, Korea and Japan. 



We have import and export qualification authorized by the state government, and have been an "AAA" graded company by the Ningbo Municipal Government for 8 years. Our company has also been honored as a "most credible company" for 9 years, and a leading tax contributor for 6 years. 



Our company attained ISO9002 certification in 1999, and became ISO9001 certified in 2002. We are one of the counsel members of the China Sewing Machinery Association, and one of the deputy director corporations in the China Sewing Machine Parts Specialist Committee. We have earned these positions by being one of the largest manufacturers of sewing machine parts in China.