4 Ways Locking: The biggest advantage of this cat flap door is that the lock with two knobs can provide 4 modes: open, lock, enter only (cats can enter but cannot exit), and only outwards (cats can exit but cannot enter); After installing this cat door, you no longer have to worry about pets coming in and out to open/close the door Low Noise and Safety: There are brush strips at the edges of cat flap doors for interior doors, which can reduce the noise generated by pets when cats enter and leave the door; In addition, the silent movement will not scare the pet or disturb the owner with magnet control Durable Material: This cat flap door was made of high-quality ABS plastic, it is sturdy and weather-resistant; The clear surface is easy to clean as well Size: 30*30*4cm Beautiful Decoration: After the round clear cat door was installed on transparent glass windows/doors, it can be used as a beautiful decoration; It is ideal for sliding glass doors, glass windows, screen window