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1-27/32” x 11/32” slots
904 - Double Deflection Adjustable Aluminum Blade Grille For a 20" x 8" Duct Opening (front blades parallel to shortest dimension)
1x2 T-Bar (8" x 20" duct)
Reinforced welded core and extra supports for heavy duty application
Standard Features * 1/2" spacing dual angular louvers * 22 & 20 gauge cold roll steel * Hand operated lever for easy filter access * Holds up to 2" thick standard filter (not included) * Removable face for easy cleaning and maintenance * Filter door hinges parallel to longest side * 4-way reversible door on square sizes * 2-way reversible door on rectangular sizes * Filter retention tabs * Concealed mounting holes * Soft White Options * SPFG-4 - holds 4" deep air filter * Standard Color
Volume Damper Low-Leak OBD 3000-0BDLL-54X20 Residential Registers & Grilles 1-27/32” x 11/32” slotsh3. 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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