Shelter SCADJ-S Adjustable Clamp On Black Galvanized Steel Single Flue Chimney Cap Designed and engineered to bolt-on to existing clay flue tile using C-clamps; Cannot be converted to slip-in Adjustable Cap fits the following outside flue tile dimensions: 8-in x 8-in, 9-in x 9-in, 8-in x 12-in, 9-in x 13-in, 12-in x 12-in, 13-in x 13-in, 8-in Round, 10-in Round, 12-in Round Outside mounting design provides maximum free air space which helps to ensure optimal draft while the attractive black powder coat finish helps protect against the elements Quick and easy installation requires only a screwdriver; Made with a 24 gauge galvanized steel hood with scalloped corners, 18 gauge 3/4-in expanded galvanized steel mesh, 14 gauge galvanized steel base and slotted hex-head bolts Helps protect internal metal fireplace fixtures and masonry chimney from deterioration; Keeps out rain, birds, animals and debris; Made in the USA and backed by a five (5) year limited warranty