Opposed Blade Volume Damper 3000-0BD-56X40 Commercial Filter retention tabs

Filter retention tabs

904 - Double Deflection Adjustable Aluminum Blade Grille For a 30" x 20" Duct Opening (front blades parallel to shortest dimension)

14 GA 304 SS Construction

Double deflection surface mount grille with adjustable airfoil blades

Options * MAR - Mounting Angle Ring (sold in pairs - 2 needed

Opposed Blade Volume Damper 3000-0BD-56X40 Commercial Filter retention tabsh3. 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.