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12-3 w/ screen
12-3 louver is an aluminum louver vent with 3 vanes that adjust to allow air flow. The sizes are an overall size of 12″ wide x 12.25″ high, and the cut-out required is 10.5″ wide x 10.25″ high. The back side requires a min. of 3/4″ clearance to allow pivot arms to clear.