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Eighteen air patterns
Building materials rated 2 hours or less
Adjustable single deflection grille
Single deflection transition box mount spiral pipe grille
14 GA 304 SS Construction
4" Round Horizontal/Vertical Fire Damper 2650-44 Smoke-Fire Damper Eighteen air patternsh3. Standard Features * 2649 Round damper for vertical mount only. Available 4" thru 52" round. * 2650 Round spring actuated (6) damper for vertical or horizontal mount. Available 4" thru 52" round. * UL and California State Fire Marshall approved * 4 1 4" standard frame style * Interlocking steel roll formed blade (3) with roll formed frames (1) * Blade lock (5) * Damper manufactured from corrosion tested galvanized mild steel (G 90) * Self locking
