The Weathershield Marine Chimney Cap helps maintain a chimney's optimum performance by keeping out rain, snow, leaves, debris, squirrels, birds and other animals. Specifically designed for homes near the ocean, the Weathershield Marine Chimney Cap is constructed of 316 Stainless Steel, for extra durability. Benefits include longer life, improved appearance and enhanced performance. An added feature is the removable mesh screen that provides a measure of safety by helping to contain sparks. This model is designed for round, air cooled chimneys, has a 1" x 1" stainless steel screen mesh and works with the following types of chimneys: Double & Triple Wall, Masonry, Solid Pack Insulated, Class A, and B vent.