18" x 18" Aluminum Gable Vent with Screen - Stylish Louvered Vents for Effective Attic and Shed Ventilation - Essential Home Improvement, Vent Opening: 16" x 16"
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18" x 18" Aluminum Gable Vent with Screen - Stylish Louvered Vents for Effective Attic and Shed Ventilation - Essential Home Improvement, Vent Opening: 16" x 16"