Volume Damper Low-Leak OBD 3000-0BDLL-64X30 Residential Registers & Grilles available with two or four

available with two or four diffusers per panel

Building materials rated 2 hours or less

Square collar designed for 20” × 20” duct

3 or 4 way patterns * Spring push release for easy access to adjust pattern controllers * Round No Labor Collar sizes: 6-10"

Lever operated steel multi-shutter damper

Volume Damper Low-Leak OBD 3000-0BDLL-64X30 Residential Registers & Grilles available with two or fourh3. 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.