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3 or 4 way air patterns from face * One size fits 6" thru 16" (collar by others) * Soft White
2" thin-line roll formed out-of-airstream frame
w/ Tool Operated Opposed Blade Damper
Steel multi-shutter damper
904 - Double Deflection Adjustable Aluminum Blade Grille For a 24" x 18" Duct Opening(front blades parallel to shortest dimension)
Opposed Blade Volume Damper 3000-0BD-54X38 Commercial 3 or 4 way airh3. Standard Features * Opposed blade operation for precise volume control * 16 gauge galvanized channel frame * Blades are vee 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.
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