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904 - Double Deflection Adjustable Aluminum Blade Grille For a 34" x 18" Duct Opening (front blades parallel to shortest dimension)
Tool Operated Opposed Blade Damper
Driftwood Tan or Soft White
Options Recessed screwdriver operated Opposed Blade Damper
Square or rectangular for vertical mount only
4" 3 Hour Vertical Mount Fire Door 2661-30X16 Accessories 904 - Double Deflection Adjustableh3. 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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