product name
Roll Shutter Door Torsion Springs
species
Black torsion spring and galvanized torsion spring
Material
Steel, Carbon steel
Usage
Garage Door/Shutter Door/Rolling Door
Wire Dia
5-10mmmm, as your requst
Surface treatment
Zinc-plated, , Electrophoresis Coating , Oxide Coating
Certification
ISO 9001 :2008
Place of Origin
CN,Tianjin