4 TYPES OF LOCKS - (Open, Off, On or Off, Locked) Four mode cat flap with lock switch, only turns, inside and outside, fully lockable, easy to control and lets your pet in and outof company. With a pet door, you no longer have to constantly close and open the door while waiting for your pet to arrive. PERFECT GLASS DECORATION - Clear design makes it suitable for your windows, perfect for windows, sliding glass doors, glazing ideal for all glasses your pets will instantly fall in love with the stylishcat flaps. SIMPLE COMFORT - There are two parts to the cat flap: the door brush dampens door noise and the inner rubber ring protects your cat from damage silent action will not scare pets or disturbthe owner. Thus, the cat is free to go to its litter box. DURABLE AND STRONG - All doors are made of strong ABS plastic which is weather resistant and offers great comfort and ease of use - Sturdy 100 percent UV resistant polycarbonate construction makes the door practicallyunbreakable. Suitable for all pets Size: 18cm x 20cm, suitable for all types of cats and some small dogs (6kg)