Opposed Blade Volume Damper 3000-0BD-40X18 Accessories Blades are parallel to the

Blades are parallel to the longest dimension

904 - Double Deflection Adjustable Aluminum Blade Grille For a 32" x 18" Duct Opening (front blades parallel to shortest dimension)

Adjustable baffle controllers to direct airflow horizontally or vertically

120x120 multiple

Extruded aluminum frame with steel roll formed blades and steel multi-shutter damper

Opposed Blade Volume Damper 3000-0BD-40X18 Accessories Blades are parallel to theh3. 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.