Zhejiang shangyu Oilseal Co. Ltd（PQK Oilseal Co. Ltd. ）, Firstly established in 1969, Is one of the largest companies combining research, Development and production, Which specializes in the production of various kinds of rubber seals and Oxygen sensor . Our company has passed ISO 9001 2000 and TS 16949 quality management system certifications, And takes production according to international standards. Now, Our company has been appointed as the OEM for more than 20 engine makers including Shanghai Volkswagen. General Motors, Rord, And Cummins, Authorized self- Management import and export operating rights, We supply products to different countries