- Frame: Hight quality galvanized iron sheet of 1.0 mm – 1.6mm thickness
- Blades: Interlocking blades roll formed from 0.8mm – 1mm thick galvanized steel (curtain blade) & thickness 1.6mm for bladed fire damper
- Blade Ramp: Formed 1.6mm thick galvanized steel with a spring holder.
- Springs: two constant force stainless steel springs
- Fusible Link: UL listed fusible link (165ºF / 212ºF)