Rotors, gears, shock absorber parts,piston, base valve, rod guide . Our company,Ningbo Kingbell Powder Metallurgy Co., Ltd. ... in Ningbo, China, with 5, 000 square meters of standard workshops in 10, 000 square meters of factory ... we have the certificate TS16949 in Jun. 2008.Ningbo Kingbell Powder Metallurgy Co. has the total assets ... term business relationship in future. auto parts (sintered products)