Medium Dog Door,Upgraded Sealing Dog Door for Wall, Double Flap Doggy Door,Steel Frame and Telescoping Tunnel Dog Doors and Cat Doors(Pets Up to 40 Lb) -Medium Description Medium Dog Door: Flap opening: 8 1/8 inches wide x 12 7/8 inches high. Door frame: 12 3/16 inches wide x 16 5/16 inches high. Wall Cutout:9 3/5 inches wide x 13 3/5 inches high Tailored for pets weighing up to 40 pounds to ensure a perfect fit Strong and : dog doors for medium dogs are made of steel frames, aluminium locks, double stops and sliding panels for a sturdy and stable structure that is not afraid of extreme weather challenges and has a long service life Optimised Brush Seals: doggie doors for medium dogs is equipped with highly efficient brush seal, which is delicate and soft, and fits closely with the door frame, effectively blocking the penetration of outside air and the entry of mosquitoes and insects Exquisite Appearance Design: Dog door medium is designed by a famous designer, with a design patent, in line with European and American aesthetics, perfectly matched with the wall, adding decoration to your home Easy to Install: Doggy door comes with intuitive cut-out templates and detailed step-by-step installation guide, making the installation process quick and easy, even if it's your first time trying it out, you can do it on your own Shipping We only ship items to your registered address for fast and accurate shipment. Thanks We will ship most orders within 1 business day some items ship same day if ordered early enough Delivery All shipments are shipped via USPS First Class (2-6 business day) from United States. Return Policy All items qualify for returns within 30 days of receipt. Feedback 1.We strive for 5 star positive feedback. We try our best to offer the best service for our buyers. 2.Please message us via before leaving negative feedback.Let's solve the problems together! 3.Please give us a chance to resolve any issues before posting a feedback. 4.Please contact us with any questions or concerns. Thank you for your watch. We look forward to serving you.