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Ships within 48 hours · Estimated delivery Aug 10 - Aug 15
12 & 14" * Mill finish
Locking screw to hold damper in place
Square collar designed for 20” × 20” duct
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inner dimension and outside dimension sizes available * Tamper proof screws * Standard Color
4" Round Vertical Mount Fire Damper 2649-36 past 12 months 12 & 14" * Millh3. 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
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