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listed Fire-Resistance Diffuser * 700 Series - T-Bar Lay-in Panel * TVB - Thermal Vapor Blanket * Square collar
904 - Double Deflection Adjustable Aluminum Blade Grille For a 34" x 18" Duct Opening (front blades parallel to shortest dimension)
3 or 4 way air patterns from face * One size fits 6" thru 16" (collar by others) * Soft White
Parallel Blade Volume Damper 3000P-70X50 past 12 months Check out the All Abouth3. Standard Features * 16 gauge galvanized channel frame * Parallel blades are cee 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. Options * 3000 PLL Low Leak Air Control
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