The Shelter 13 x 13 in. Single Flue Chimney Cap is the durable and economic choice for chimneys in most regions. The outside mounting design provides maximum free air space and better draft while the attractive powder coat finish helps it stand up to the elements. The chimney cover is made with a 24 gauge galvanized steel hood with scalloped corners and straight cut edges, 18 gauge 3/4 in. expanded galvanized steel mesh, 14 gauge galvanized steel base and slotted hex-head bolts. Chimney cap fits outside flue tile dimensions from 11.5-in. x 11.5-in. to 13.5-in. x 13.5-in. Outside mounting design provides maximum free air space which helps to ensure optimal draft Attractive black powder coat finish helps protect against the elements Quick and easy installation requires only a screwdriver Helps protect internal metal fireplace fixtures and masonry chimney from deterioration Chimney cover keeps out rain, birds, animals and debris Arrests sparks and reduces certain downdrafts Designed and engineered to bolt-on to existing clay flue tile If there is not enough flue tile extending above the crown of the chimney, the leg kit (model # SCLK) can be used to convert chimney cover to slip-in Not recommended for coal or oil-burning appliances Chimney cap is made in the USA Backed by a 5 year limited warranty