Description: Give your cat the freedom to come and go as he or she pleases with this cat flap that has a 4 way locking system. Slide the locks on the bottom of the flap to set the door to one of the following: Locked from both sides; Cats can only enter from the outside but not go out again; Cats can go out but can not get back in (for preventing other cats also entering); Completely open and cat can come and go at its will. Made of the plastic material, easy to install, simple to operate. Specification: Material: ABS Size Chart: Large: Outside Doorframe: 25x23.5x5.5cm / 9.84x9.25x2.17inch Inner Doorframe: 19x18cm / 7.48x7.09inch Small: Outside Doorframe: 20x19x2cm / 7.87x7.48x0.79inch Inner Doorframe: 16x15.7cm / 6.30x6.18inch Package Includes: 2 Pieces Pet Flap Door Note: Transition: 1cm=10mm=0.39inch Please allow slightly 0-1cm difference due to manual measurement. Colors can appear different depending on light and how the listing is viewed. Thanks for your understanding and attention. Wish you a pleasant shopping experience!