... certified factory. Key Specifications/Special Features:Product Name: Extension SpringFeatures: Wire Diameter: 0.02 to 20mm;Raw ... quick response, and good after-sales serviceEco-friendly products: RoHS compliantGood quality control: serious QC procedure to ... : All kinds of cars, machinery, home appliance, electronic products, electric appliance, cameras, stationery, computers, power switches, miniature ...