Yanwei hardware spring factory

Our factory is specialized in manufacturing torsion springs for garage door, rolling up door, industrial door, and make torsion spring according to DIN. We can also produce springs according to customer requirements with series quality grade and also at a reasonable price . Quality Control: The enterprise has fully implemented ISO 9001:2008 international quality management system. The Specification of spring: 1.75'' 2.0'' 2.625'' 3.75'' 5.25'' 6'' etc. Wire Diameter: ø4.0~ø13mm.