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904 - Double Deflection Adjustable Aluminum Blade Grille for a 48" x 18" Duct Opening (front blades parallel to shortest dimension)
Square collar designed for a 20” × 20”
Back blades are parallel to the longest dimension
904 - Double Deflection Adjustable Aluminum Blade Grille For a 24" x 16" duct Opening (front blades parallel to shortest dimension)
Volume Damper Low-Leak OBD 3000-0BDLL-72X48 Specialty Products 904 - Double Deflection Adjustableh3. 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.
US$ 28.00
US$ 18.00
US$ 11.95
US$ 44.00
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