17" x 21"Chimney Cap: All bolts and extended edges are prepared for you to adjust the bottom size for smaller chimneys; extended edges for fitting bigger chimneys. This humanized design makes the chimney cap a perfect outdoor protection solution, saving your extra expenses. It fits flue sizes from 14.7" x 18.7" to 19.4" x 23.4". Durable Coated Steel: Constructed from heavy-duty alloy steel with a black powder-coated finish, this chimney cover is designed to withstand rain, snow, and extreme temperatures. The robust design resists deformation, while the powder coating not only adds a sleek and attractive look but also provides excellent rust resistance. Built to endure the toughest outdoor conditions, it offers long-lasting performance year after year. Protect Your House: Our chimney caps come with a large sturdy hood and uniform meshes, building a comprehensive structure to keep your chimney flues from disturbances such as birds, small animals, rain, snow, leaves, debris, etc. Also, the meshes provide smooth ventilation and security use. Assemble in Seconds: Simple follow the instruction manual included in our package. The edge-folded corners will protect your hand from injuries. Unique interlocking designs make it effortless for just one person to quickly finish the installation, saving your time and effort. Meanwhile, its stable structure ensures a secure and long-lasting use. Ideal for Outdoor Flues: As a reliable protector, our fireplace chimney caps are professionally designed to protect your outdoor masonry chimneys from deteriorating, extending its service life. BUYYAH Square Chimney Cap – Black Powder-Coated Steel Chimney Cover for Rain, Animal, and Debris Protection Keep your chimney safe, clean, and functioning properly with the BUYYAH Square Chimney Cap. Designed to prevent small animals, rain, snow, dust, and falling leaves from entering your chimney, this durable metal cover is the perfect solution for maintaining optimal airflow and protecting your home. Crafted from heavy-duty alloy steel and finished with a black powder coating, this chimney cap is built to withstand harsh weather conditions without rusting, bending, or breaking down over time. The sleek black finish adds a clean, modern look to your rooftop while ensuring long-lasting corrosion resistance. Whether you're dealing with squirrels, birds, or just trying to keep your chimney clear of debris, the BUYYAH Chimney Cap offers the protection you need with easy installation and a secure fit. Key Features: All-Weather Protection: Effectively blocks rain, snow, leaves, and animals from entering your chimney. Durable Steel Construction: Made of high-quality alloy steel for strength and stability. Rust-Resistant Finish: Black powder-coated surface resists corrosion and maintains a stylish appearance. Square Design: Fits most standard square chimney flues and ensures proper ventilation. Easy to Install: Includes everything you need for a secure and hassle-free installation.