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Ships within 48 hours · Estimated delivery Aug 18 - Aug 23
Minimum size is 4"x4"
904 - Double Deflection Adjustable Aluminum Blade Grille For a 20" x 14" Duct Opening (front blades parallel to shortest dimension)
Square collar designed for 22" x 22" duct
Opposed Blade Damper standard on 4" widths
Volume Damper Low-Leak OBD 3000-0BDLL-48X16 Residential Registers & Grilles Minimum size is 4"x4"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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