Closer Pets Large Cat & Small Dog DoorSpecially developed for the largest cats or small dogs such as Yorkshire Terriers, Pekinese, Dachshund, Miniature Poodles and Spaniels up to a shoulder height of 360mm (14). A secure 4 way locking mechanism gives complete control of your pets movement. Key Benefits: Self lining to 50mm (2) thick ideal for all doors and thin panels. Silent action will not frighten pets or disturb owner. Transparent flap is preferred by most pets. Draft and weatherproof