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Adjustable steel curved blades
Lever operated Multi-Shutter Damper
Nylon bushings on adjustable blades prevent metal on metal rattle
Double deflection surface mount grille with adjustable airfoil blades
Opposed Blade Volume Damper 3000-0BD-58X16 past 12 months Adjustable steel curved bladesh3. 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.
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