LESYPET Dog Screen Door - Pet Dog Door with Magnetic Automatic Lock for Pet Screen door Tip : Please measure your pet size (body height , body width) and compare with the dog screen door inner size. Features : Upgraded joint inner shaft for firm working life ; Padded frame ; Bothway open and close by magnetic lock ; Two tabs for lock door and safety ; Glossy surface not scratch pet skin Design for : All screen window , screen door or screened area to make small to large pet in and out by Lesypet pet door Easy Installation at home : Including the English installation instructions of the Pet door for screen Size : External 13.6 L  0.5 W  18 H ; Internal 12 W  15.5 H