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linkage and handle enclosed in valve to assure trouble-free operation * Soft White Options * 955 O - steel opposed blade damper * Tamper proof screws * Standard Color or Designer Color Finish available on this product
For damper free area chart A click here * 2563 - Out-of-Airstream fire door
450 Series Submittal
alternate frame is extruded aluminum with signature line marks
Tamper Proof Screws - stainless steel TORX Center Pin
4" 3 Hour Vertical Mount Fire Door 2665-20 Step Down Ceiling Diffuser linkage and handle enclosed inh3. Standard Features * 2661 Square or rectangular fire door for vertical mount only. Maximum dimension 60x60. For damper free area chart A click here * 2663 Out of Airstream fire door. Square or rectangular for vertical mount only. Maximum dimension 60w x 52h. For damper free area chart B click here * 2665 Round fire door for vertical mount only. Available 4" thru 52" round. * 3 hour rated * UL and California State Fire Marshall approved * 4 1 4"
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