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Access door with 1-3/8" deep steel roll formed frame
cross bars
904 - Double Deflection Adjustable Aluminum Blade Grille For a 24" x 4" Duct Opening (front blades parallel to shortest dimension)
UL listed and tested in accordance with UL Standard 555
Hinged removable door with hinges parallel to the longest dimension
Opposed Blade Volume Damper 3000-0BD-14X14 Accessories Access door with 1-3/8" deeph3. 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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