Operating cycle is 60000 cycle
Oil-tempered process&Galvanized Springs are optional
Garage Door,Garage Door Parts
1). Torsion spring type: it can be made of Oil-tempered Process or Zinc Galvanized Process Treatment.
2). Lifting Door Torsion Springs & Extention Springs are available.
2). The Spring's size, length such Dia.of steel, steel type can be customized according to customer's requirements. It's more easily for customer to cut or adjust.
4). Operating cycle of torsion spring is 60000 operating cycles.
5). Delivery to Destination can be organized by our factory.