4 Types of Locks - (Open, Stop, On/Off, Locked) pet door with four modes, with switch lock, rotate only, inside and outside, fully lockable, easy to control and get in and out of your animals; With a pet door, you no longer need to constantly close and open the door waiting for your pet to arrive. PERFECT GLASS DECORATION - Clear design for your windows, great for windows, sliding glass doors, window glass; ideal for all glass; your pets will instantly fall in love with the stylish cat flaps. SIMPLE COMFORT - There are two parts in the cat flap: the door brush dampens door noise, and the inner rubber ring protects your cat from harm; the silent motion won't scare pets or bother owners. A cat has free access to its litter box. DURABLE AND CORROSION RESISTANT - All doors are made of sturdy ABS plastic which is weather resistant and very comfortable and easy to use - The sturdy construction is made of 100% UV resistant polycarbonate and one door is virtually unbreakable. Fits all pets size: 18cm x 20cm, suitable for all cat and some small dog breeds (6kg); to provide more freedom for your pet, please don't hesitate to order this incubator.