4 1/4" Vertical Mount Fire Damper 2633-40X8 Accessories * 2550 - Round Spring

* 2550 - Round Spring actuated (6) damper for vertical or horizontal mount

Individually welded 14 guage diffusion bars

blades prevent metal on metal rattle Countersunk mounting holes with color matching Phillips Pozidriv screws Rust-resistant pre-coat with durable powder finish Soft White Options Screwdriver operated Opposed Blade Damper 2" ADC compliant square to round collar with a bead for ease of installation Heavy Duty Construction MRI Compatible Insect Screen Fractional

Perforated face grille

4 1/4" Vertical Mount Fire Damper 2633-40X8 Accessories * 2550 - Round Springh3. Standard Features * 2633 Square or rectangular out of airstream fire damper for vertical mount only. * 2634 Square or rectangular Spring actuated (6) out of airstream fire damper for horizontal or vertical mount. * UL and California State Fire Marshall approved * 4 1 4" standard frame style * Maximum dimension 60w, 52h * Interlocking steel roll formed blade (3) with roll formed frames (1) * Blade lock (5) * Damper manufactured from corrosion