Lets air in or blocks it off. It will disperse air in four directions, reducing draft. Catches condensation, rain and outside dust when the vent is left open. Reflective Sunshield surface blocks 100% of the sun's damaging rays. Dual clips and screws install into exsiting vent mounting holes. Fits 14" x 14" vents.
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ALL products we sell are factory new and come with the full Manufacturers Warranty!