Finish: galvanized or not Package: wooden case Capacity: 5000 kgs / day Garage door torsion springs are secured to a metal shaft above the garage door. Depending on the system, the shaft may pass through the middle of the springs or spring, or the shaft may sometimes house the spring. If the shaft passes through the middle of the torsion spring, the spring may be mounted in the middle of the ...
[China Manufacturers]