Opposed Blade Volume Damper 3000-0BD-62X20 Step Down Ceiling Diffuser 904 - Double Deflection Adjustable

904 - Double Deflection Adjustable Aluminum Blade Grille For a 34" x 18" Duct Opening (front blades parallel to shortest dimension)

904 - Double Deflection Adjustable Aluminum Blade Grille for a 16" x 8" Duct Opening   (front blades parallel to shortest dimension)

Available 4" thru 28" round

102 P - two way

Attractive concentric ring deflects air stream 360°

Opposed Blade Volume Damper 3000-0BD-62X20 Step Down Ceiling Diffuser 904 - Double Deflection Adjustableh3. 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.