Hy-C Roof Ventguard, made of durable stainless steel with a 5/8" 18 gauge galvanized mesh, effectively prevents small animals from nesting in exhaust vents. Its powder coated black finish ensures longevity and resistance to corrosion. This ventguard protects your home from wildlife damage by preventing animals from chewing through plastic roof vents and entering attics and crawl spaces, where they can cause wiring damage, leaks, and severe structural issues.