Frame: made from High quality galvanized steel gauge 16. Stainless steel frame is available as option.
Blades: made from High quality galvanized steel gauge 22. Stainless steel blades are available as option.
Blade Ramp: from galvanized steel with a spring holder.
Closure Springs: made from stainless steel spring
Fusible links: UL listed fusible links which has fire rating of 165° F / 212° F .
The frame is made from high quality galvanized steel gauge 22. All welded joints are rust proofed by zinc paint coating .
The blades made from High quality galvanized steel gauge 22. The interlocking type blades are designed with hat shaped reinforcement ridges ensuring strength and stability. .
Constant force stainless steel sprigs are firmly secured to the blades and held in place on the ramp