This Kitty City brand MEGA CATIO comes with an extra tunnel attachment. Only set up and used once. FRESH AIR FUN: Fully-enclosed playset is made of a nylon mesh – let’s in fresh air and gives you a good view of your pets at play whether it’s indoors or out! And the mesh is durable too, enough to withstand energetic play and the occasional claw climb. SPOTS TO HIDE AND SNOOZE: Included cubby cubes are rearrangeable inside the structure, giving you plenty of ways to keep your cats engaged by mixing it up over time. Each is a perfect spot to curl up and get away from the action. GREAT FOR MULTI-CAT HOMES: Have more than one cat at home? No problem at all! Kitty City mesh playsets offer plenty of room for several pets to run, hide and chase. It’s a relatively small footprint in your home for all the energy it will help them burn. EASY ENTRANCE: A zip door in the side makes it easy for you to get into the Mega Kit – handy if you have a cat who’s curled up and just can’t be bothered to come out for dinner.