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Ships within 48 hours · Estimated delivery Aug 9 - Aug 14
Available 4" thru 40" round
enclosed in valve to assure trouble-free operation
3/16” holes on 1/4” staggered centers
Opposed Blade Damper
3 Hour Out Of Air Fire Door Grille 2663-48X40 T-Bar Available 4" thru 40" roundh3. 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"
