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Ships within 48 hours · Estimated delivery Aug 15 - Aug 20
Available 4" thru 40" round
904 - Double Deflection Adjustable Aluminum Blade Grille For a 24" x 20" Duct Opening (front blades parallel to shortest dimension)
2550 Series Engineering/Performance Data
Nylon bushings on adjustable blades prevent metal on metal rattle
5/32” crossbars
Opposed Blade Volume Damper 3000-0BD-66X14 Specialty Products Available 4" thru 40" roundh3. 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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