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Ships within 48 hours · Estimated delivery Aug 19 - Aug 24
1" and 1 1/2"
Maximum single section size 24"x24"
Front blades are parallel to the shortest dimension
904 - Double Deflection Adjustable Aluminum Blade Grille For a 30" x 30" Duct Opening (front blades parallel to shortest dimension)
with 53% free area
Volume Damper Low-Leak OBD 3000-0BDLL-34X10 Commercial 1" and 1 1/2"h3. 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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