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14 gauge steel construction
Nylon bushings on adjustable blades prevent metal on metal rattle
Install with louvers in up or down position for best duct concealment
Designed to minimize vision into the air duct
Damper manufactured from corrosion tested galvanized mild steel (G-90)
Opposed Blade Volume Damper 3000-0BD-42X16 Residential Registers & Grilles 14 gauge steel constructionh3. 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.
