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904 - Double Deflection Adjustable Aluminum Blade Grille For a 24" x 18" Duct Opening(front blades parallel to shortest dimension)
1” rim size (2” larger than nominal duct size / order size)
Smoke Test and More Information on MA Series Diffusers
TVB - Thermal Vapor Blanket
inner dimension and outer dimension sizes available * Tamper proof screws * Standard Color
4" Round Vertical Mount Fire Damper 2649-32 Specialty Products 904 - Double Deflection Adjustableh3. 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
