3-Flap Steel Large Dog Door for Exterior Doors with Sliding Lock Panel, Energy-Efficient Insulated Pet Door, Extreme Weather Doggy Door with Telescoping Tunnel, Never Rust（Pets Up to 100 Lb）

Freedom and Security: Every pet deserves the freedom to explore their home and be close to their family. Our large dog doors with built-in locks ensure your pet's independence while controlling access. Our well-designed large dog door for exterior doors allow pets to pass freely while protecting your home. Upgraded 3-Flaps Design: The 3-flaps design of the dog door provides superior protection from the elements and enhanced insulation to keep extreme temperatures out. This dog door not only insulates against extreme weather conditions and drafts, but also ensures that your home remains comfortable and energy efficient. Superior Durability: The doggy door is made entirely from metal laser welding process and oxidised high quality steel and aluminium alloys to ensure durability, security and thermal insulation. Advanced welding technology ensures strength, rust resistance and a perfect finish that won't flake. Built to last, this pet door is ideal for multi-pet households. Easy Installation: Easily fits into wood, PVC, and metal doors ranging from 1.2” to 2” thick. This insulated dog door comes pre-assembled, and includes templates and detailed instructions for a hassle-free installation. This doggy door comes with a metal closing panel. Intimate Customer Service：MIAOTONG is committed to providing our customers with high-quality products and excellent after-sales service. If you have any questions about this dog door, please contact us, we will follow up and solve the problem for you at the first time