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904 - Double Deflection Adjustable Aluminum Blade Grille for a 48" x 18" Duct Opening (front blades parallel to shortest dimension)
700MA Series Engineering/Performance Data
18" or 24" lengths * Soft White Options * Standard Color or Designer Color Finish available on this product
Single deflection radius mount spiral pipe grille with adjustable blades
125") Aluminum Construction 12 GA Steel Construction
Opposed Blade Volume Damper 3000-0BD-70X64 Commercial 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.
