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1050 Series Submittal
Nylon bushings on adjustable blades prevent metal on metal rattle
Opposed Blade Damper
Countersunk mounting holes for flush appearance with stainless sheet metal screws
Adjustable blades oriented for 3 or 4-way air flow pattern
4" 3 Hour Vertical Mount Fire Door 2661-36X14 Accessories 1050 Series Submittalh3. 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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