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cross bars
22 gauge butterfly style galvanized steel blades
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RS34 Series Engineering/Performance Data
2" Vertical Mount Fire Damper 2501-36X18 Residential Registers & Grilles cross barsh3. Standard Features * 2501 Square or rectangular for vertical mount only. Maximum dimension 48w, 49h. * 2502 Square or rectangular spring actuated (6) for horizontal or vertical mount. Maximum dimension 41w, 36h. * UL and California State Fire Marshall approved * 2" thinline frame * 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
