The Black Large Essential Pet Door is suitable for pets up to 100 lbs. Designed for doors, walls, and screens up to 2.17” thick, the outer frame measures 13.82” x 18.86” and the durable polycarbonate flap measures 11.81” x 16.5”. Built for frequent and heavy use by pets, this Essential Pet Door is noncorrosive and weather resistant meaning it'll last for years to come. The included locking panel allows for two-way controlled access for your pet and the magnetic centring flap ensures the door shuts after each use. The large frame suits bigger sized breeds, including Collies, Setters, Labradors, Boxers, Pointers, Bulldogs, German Shepherds and more. Have complete peace of mind knowing that the Essential Pet Door is designed to last and includes a 1-year limited manufacturer’s warranty. Give your pet the freedom to roam with a Hakuna Pets pet door.