Volume Damper Low-Leak OBD 3000-0BDLL-44X42 Accessories Standard Features * Fixed airfoil

Standard Features * Fixed airfoil blades parallel to 1st dimension given *

Lever operated multi-shutter damper

CB20 - two way

round collar only) * 830 OR - factory installed opposed radial damper (sizes 6"-14") * 830 FR - U

904 - Double Deflection Adjustable Aluminum Blade Grille For a 30" x 18" Duct Opening (front blades parallel to shortest dimension)

Volume Damper Low-Leak OBD 3000-0BDLL-44X42 Accessories Standard Features * Fixed airfoilh3. 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.