Volume Damper Low-Leak OBD 3000-0BDLL-72X60 Step Down Ceiling Diffuser 1x2 T-Bar (8" x 20"

1x2 T-Bar (8" x 20" duct)

Directional volume diffuser with 4-way removable core

904 - Double Deflection Adjustable Aluminum Blade Grille For a 20" x 14" Duct Opening (front blades parallel to shortest dimension)

Minimum size is 4"x4"

Uniform 360 degree discharge pattern

Volume Damper Low-Leak OBD 3000-0BDLL-72X60 Step Down Ceiling Diffuser 1x2 T-Bar (8" x 20"h3. 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.