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Ships within 48 hours · Estimated delivery Aug 21 - Aug 26
Heavy gauge steel construction
Holds up to a 4" filter (not included) with filter retention tabs (FG4)
904 - Double Deflection Adjustable Aluminum Blade Grille For a 40" x 18" Duct Opening (front blades parallel to shortest dimension)
Rust resistant pre-coat with durable powder finish
Nylon bushings for easy adjustment and quiet setting of blades running parallel to shortest dimension
Parallel Blade Volume Damper 3000P-60X20 Specialty Products Heavy gauge steel constructionh3. Standard Features * 16 gauge galvanized channel frame * Parallel blades are cee stiffened 16 gauge galvanized for strength and stability * Blades pivot on non metallic celcon bushings * 1 2" square zinc plated steel pivot pins * 1 2" square zinc plated steel adjustable operating shaft extending up to 4" beyond the air control frame * Single blades on dampers with a height of 12" or less * Mill finish h3. Options * 3000 PLL Low Leak Air Control
