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904 - Double Deflection Adjustable Aluminum Blade Grille For a 20" x 8" Duct Opening (front blades parallel to shortest dimension)
Surface mount fixed blade grille with airfoil blades at 0°
Ideal for residential and light commercial application
4-Way ceiling register with stiffened 1/2" fan shaped louvers for silent operation
Blade lock to secure blades once the product is activated
Opposed Blade Volume Damper 3000-0BD-62X12 Residential Registers & Grilles 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.
