Opposed Blade Volume Damper 3000-0BD-40X18 Accessories Retainer cables are provided on

Retainer cables are provided on sizes 12" and larger to allow the inner cones to hang securely while adjusting the diffuser

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

850 Series Submittal

120x120 multiple

Opposed Blade Volume Damper 3000-0BD-40X18 Accessories Retainer cables are provided onh3. 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.