Locking Methods: The cat flap has 4 locking methods: inward-opening, outward-opening, two-way opening and locking. If your pet wants to enter the room, you no longer need to open the door. The cat door makes your life easier and your pet more free at home. Very quiet: this swing door is very quiet and offers the best wind protection thanks to the specially reinforced door coverings. Three-sided brush strips can eliminate noises when opening and closing the door. It also stops raindrops or pests like mosquitoes. Easy Installation - This pet door is suitable for brick walls, wooden doors, PVC and metal doors and can be installed in doors and walls with a thickness of 2-5 cm. Please note this and prepare the necessary tools which are easy to install if necessary. Premium Material: The door frame is made of PP and the transparent cover of the flap is made of high-strength polyethylene, which can resist ultraviolet rays , has good transparency, prevents pets from grabbing and biting and is