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Combination Louver / Damper offers superior resistance to rain and weather while also offering you the ability to completely close the opening off if needed. The channel frame is 4" deep with a 1-1/2" flange and drainable 45 degree fixed blades in the front with adjustable blades with seals for tight shutoff in the back all within one frame. The adjustable rear blades are operated with a thumb screw and come standard with birdscreen on the back. MADE IN THE USA

18" Combination Louver / Damper with Flange

18-in-combination-louver-damper-with-flange

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Combination Louver / Damper with Flange 18" - ACL-F 18