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Lever operated Opposed Blade Damper
Spiral Diffuser Radius Flush Mount Diffuser Single Deflection with Damper
Rust resistant pre-coat with durable powder finish
Uniform 360 degree discharge pattern
Countersunk mounting holes with color matching Philips posi-drive screws
Backdraft Vertical Mount 3550-26X20 Specialty Products Lever operated Opposed Blade Damperh3. Standard Features * 3550 Vertical mount * 3560 Horizontal mount air up * 3570 Horizontal mount air down * 3580 Round sizes available 5" to 24" * All non motorized backdraft dampers * Dampers are opened by air pressure differential and closed by gravity * 16 gauge channel frame with 26 gauge galvanized blades * Out of airstream linkage * Blades are vee stiffened 26 gauge for strength and stability * Square steel pivot pins * Nylon bushings * Single
