Compression Spring made of various material with different finish; Made in ISO/TS16949:2002 and ISO14001:2004 certified ... resisting alloy, corrosion-resistant alloy, brass, and bronze (most of them are imported from Korea, Germany and Japan)Finish: ... and other countries and rigionsOEM/ODM services.Applications: All kinds of cars, machinery, home appliance, electronic products, electric appliance, ...