Tomahawk Round Slip In Galvanized Steel Chimney Covers Discontinued Size:CB0818 (18 in) Flow Speed Measurement Flow Speed Measurement and the type of light you will use to fluoresce the tags making them a reliable and lasting solution for chimney protection Feature Model CBO811 Model CBO813 Model CBO815 Model CBO816 Model CBO818 Type Round Slip In Galvanized Steel Chimney Cover Material Galvanized Steel Hood Gauge 24 Gauge Base Gauge 14 Gauge Mesh 18 Gauge 3 4" Expanded Galvanized Steel Mesh Corner Style Scalloped Drip Edge Included Installation Type Slip In Inside Diameter (inches) 10 in 12 in 14 in 16 in 18 in Inside Diameter (mm) 254 mm 305 mm 356 mm 406 mm 457 mm round slip in chimney cover galvanized steel chimney cap animal proof chimney cover chimney guard for animals galvanized steel mesh chimney cover wildlife exclusion chimney cap 24 gauge chimney cover 3 4 inch mesh chimney guard rust resistant chimney cap rodent proof chimney screen slip in chimney protection chimney top animal barrier galvanized hood chimney cap chimney cover with drip edge heavy duty chimney screen squirrel and raccoon chimney guard chimney cap for round flue easy install chimney cover galvanized steel chimney protector scalloped edge chimney cap