This XXL TRIXIE 4-way cat flap door with a tunnel element gives your pet a free pass to enter or leave the house even when the door is shut. Cats often change their minds several times a day about where they want to be. Hence, you may not feel like opening the door for your pet all the time. This is when the cat flap door comes in handy. This cat flap door has a transparent flap and works silently. The cat flap door can be set in 4 modes: open both ways, closed both ways, only open for getting out, only open for getting in. The 360° circumferential seal and turn-lock fastener help to keep out the cold air. A tunnel element is included for walls and thick doors. You can also buy more tunnel elements to extend the cat flap door. Note: Please read the fastening instructions carefully and make sure the cat flap is mounted at the right height for your pet.