The Karlie cat doors Porta make life easier for outdoor cats and their owners. They consist of a frame, a hinge, and a horizontally mounted flap. The flap is pushed forward by the cat's head, allowing it to pass through the opening. This enables the cat to independently and safely transition between the house and the outside. A magnetic closure and a brush seal make the cat door weatherproof and draft-proof. Additionally, the locking system allows you to control whether the cat can come and go freely or if access is restricted. The mechanical cat door with a 4-way lock offers the choice between open (both in and out) and closed, as well as the options for only in or only out. The door also features a tunnel element (50 mm) for concealing the passage.