Volume Damper Low-Leak OBD 3000-0BDLL-54X12 Step Down Ceiling Diffuser Standard Features * Stamped steel

Standard Features * Stamped steel curved blade T-Bar lay-in diffuser with perforated face * Five air patterns: 101 P - one way

3 hour fire resistance rating

Note: Sizes are Listed Nominal Duct Opening

1x1 T-Bar (10" x 10" duct)

Hinged removable door with hinges parallel to the longest dimension

Volume Damper Low-Leak OBD 3000-0BDLL-54X12 Step Down Ceiling Diffuser Standard Features * Stamped steelh3. 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.