Opposed Blade Volume Damper 3000-0BD-30X30 Residential Registers & Grilles Hinged removable door with hinges

Hinged removable door with hinges parallel to the longest dimension

Countersunk mounting holes for flush appearance with color matching Phillips Pozidriv screws

Ceramic fiber blade insulation with fiberglass cover*

904 - Double Deflection Adjustable Aluminum Blade Grille For a 36" x 30" Duct Opening (front blades parallel to shortest dimension)

Opposed Blade Volume Damper 3000-0BD-30X30 Residential Registers & Grilles Hinged removable door with hingesh3. 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.