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T-Bar hinged 2 Cone Step Down Diffuser with Round Collar
Square collar designed for 20” × 20” duct
Standard Features * Heavy guage cold roll steel (same as 350 series) * Ideal for return air in the toe space areas between kitchen cabinets
Building materials rated 2 hours or less
2" ADC compliant round collar with a bead for ease of installation
4" Round Horizontal/Vertical Fire Damper 2650-48 Specialty Products T-Bar hinged 2 Cone Steph3. 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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