Screen Door Pet Passage Door. Fast and easy installarion. Innovative Pass Through Locking Door mounts to an existing screen door. Comes complete with detailed instructions. Designed to swing closed after passage. Limited lifetime warranty. Let your pet use your screen door without you there to open it. This pet passage door allows you to keep your screen door closed yet your pets can enter or exit as they please. With a lock and auto closing features this pet door is the ideal chouice for screen doors. Flap 8" X 10" Frame 9 7/16" X 11 7/16".