Gable Master External Wall Vents <![CDATA[Half Round Exterior Wall Vent 34″/864mm x 22″/559mm]]> <![CDATA[Octagon Exterior Wall Vent 18″/457mm Width]]> <![CDATA[Octagon Exterior Wall Vent 22″/559mm Width]]> <![CDATA[Octagon Exterior Wall Vent 32″/812mm Width]]> <![CDATA[Oval Exterior Wall Vent 21″/533mm x 27″/686mm]]> <![CDATA[Rectangular Exterior Wall Vent 12″/304mm x 18″/457mm]]> <![CDATA[Rectangular Exterior Wall Vent 18″/457mm x 24″/609mm]]> <![CDATA[Round Exterior Wall Vent 22″/559mm]]> <![CDATA[Round Exterior Wall Vent 36″/914mm]]> <![CDATA[Round External Wall Vent 16″/406mm]]> <![CDATA[Round External Wall Vent 18″/450mm]]> <![CDATA[Round Gable Wall Vent 12″/300mm]]> <![CDATA[Round Gable Wall Vent 16″/400mm]]> <![CDATA[Round Gable Wall Vent 20″/500mm]]> <![CDATA[Round Top Exterior Wall Vent 14″/356mm x 22″/559mm]]> <![CDATA[Round Top Exterior Wall Vent 22″/559mm x 32″/812mm]]> <![CDATA[Square Exterior Wall Vent 12″/304mm x 12″/304mm]]>