3 3/4 inches torsion spring for industrial door and garage door.
Material : Steel
Size: 3 3/4 inches.
Hefei Wang Qin Spring Co., Ltd. Was founded in 2006, is located in one of the National Garden - Hefei City, Anhui province. We professionally produce all kinds of luxury garage doors, industrial doors, shutter doors in matching torsion springs and tension springs. In addition, we are also supporting the production with all kinds of flange, steel wire wheel, and a variety of other accessories, etc...
Since the establishment of the company, the introduction of spring research, design of outstanding talent, focus on designing and producing automatic door balance system spring. With professional producing and testing equipments, from selecting of material properties to design each door spring to match, controlling the production quality strictly until after-sales service, All reflect Qin Yong Spring Factory's enterprise spirit " More excellence, Quality first, All satisfy customers requirements".