Professional Manufacturer Custom High Strength Spring Steel Nickel Plating Double Torsion Spring For Equipment Machine Detailed Photos Product Description Professional Manufacturer Custom High Strength Spring Steel Nickel Plating Double Torsion Spring For Equipment Machine High-quality spring steel, can be customized Company Profile Our company Hangzhou Chaotuo Electric Automation Co., Ltd ,was founded in 2001, with more than 20 years of hardware manufacturing experience, the main production: Fan shield, Shang Chao household hardware products and all kinds of high-strength fasteners, as well as fans and accessories, we have engaged in fan supporting for many years of production and management experience, accept OEM/ODM, the company has successfully passed the ISO 9001 quality management system certification, in addition to obtained 20 patented products and technologies, We are always committed to providing quality products and services to our customers and will continue to strive to stay ahead of the game.