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60% free area * Soft White Options * Countersunk screwholes with matching Phillips #8 x 1-1/2" oval Screws * 10 or 12 gauge steel * Tamper proof screws
2x4 T-Bar (20" x 44" duct)
Countersunk mounting holes with color matching Philips posi-drive screws
Front blades parallel to shortest dimension
Options Recessed screwdriver operated Opposed Blade Damper
4" Horizontal/Vertical Mount Fire Damper 2634-24X16 Specialty Products 60% free area * Softh3. 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
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