... conformity certifications.About Us:1) We are the first factory of manufacturing guide bar, saw chain, and sprocket in ... saw file, trimmer line and so on.2) Our factory has been appraised as "Top Ten Industrial Enterprises", "Predominant ... standardization.3) Our main markets are North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia, Western Europe, Central ...