Replacement Flap for X-Large Heavy Duty Aluminum Dog Door Unmatched Durability: Made from high-quality, flexible materials, our extra large replacement flap ensures long-lasting performance Exceptional Airtightness: The seamless, side-bottom magnetic mechanism ensures airtightness, creating a cozy, draft-free space for you and your furry friend Dimensions: Measuring 23 1/2″ in length and 13″ in width, this flap is designed to fit your extra large dog door perfectly Easy Installation: Install in minutes using just a screwdriver—no complicated tools or steps needed Reliable Customer Support: We pride ourselves on exceptional service and quality materials. Our dedicated support team is always ready to help with any questions or concerns