Ownpets Aluminum Large Dog Door for Wall and Door, Double Flap Energy Efficient, Telescoping Tunnel and Lock Panel, Heavy Duty Doggy Door for Dogs Up to 100lbs

Energy Efficient Double Flap: Engineered for superior insulation, this pet door utilizes a double-flap system that creates an effective airlock barrier. Crafted from corrosion-resistant aluminum and high-grade silicone flaps, the design ensures minimal heat transfer and exceptional weather sealing. This advanced combination keeps indoor temperatures stable, reduces energy loss. | All-Aluminum Alloy, Never Rust: The aluminum frame naturally resists rust, corrosion, and weather damage. It performs reliably in humid, rainy, or coastal environments and retains its appearance year after year with almost no upkeep. | Universal Wall or Door Installation: Designed for flexible placement, this complete kit includes an adjustable telescoping tunnel and all mounting hardware for easy installation into wooden doors or exterior walls, Fits walls 1.1 to 7.2 inches thick. | Superior Weatherproof & Security Features: Unlike ordinary PVC/vinyl flaps, our high-grade silicone remains flexible in extreme temperatures (-40°F to 200°F), resists cracking, tearing, and UV damage, and provides a superior airtight seal. Magnetic edges ensure a secure close, blocking wind, rain, and pests while being gentler on your pets body. The sliding lock panel allows you to easily secure the flap from inside, providing control and peace of mind. | Ideal Size for Large Dogs: The pet flap measures 11.4" W x 17.7" H, and the overall frame size is 14.57" W x 20.87" H. This size is ideally suited for small to medium breeds weighing up to 100lbs. Always measure your pet's height and width to ensure a perfect fit. | Complete Kit for Easy & Secure Setup: Everything you need for a secure installation is included: the pre-assembled tunnel, a robust aluminum interior and exterior frame, a security locking slider, and all necessary mounting hardware. Detailed instructions make it a straightforward DIY project that will provide your pet with years of convenient freedom.