Aluminum alloy construction resists , corrode, and harsh weather for long-lasting performance. Louvered devise blocks rain, snow, and debris while maintaining proper draft and preventing downdrafts. Keeps out birds, squirrels, and other pests; pre-assembled with screws for quick and secure installation. Fits most standard square chimneys on villas, houses, and apartments; available in 10, 12, and 14 inch sizes. Heat-resistant structure ensures reliable protection year-round with minimal maintenance required., Manufacturer: Shiketong