More Durable and High Quality Materials MQUPIN cat tunnel is made of premium polyester and can avoid scratches from sharp claws. Your cats can play hide and seek thanks to the stable steel frame, without worrying about collapsing or deforming. More Fun for Your Pets The tunnels invite the cat to hide, run, leap and chase each other. The ball will stimulate your cat's hunting instinct, encourage activity and bring out your cat's natural hunting instinct. hanging ball and bells in the middle, which will encourage curiosity and keep your cat entertained for long hours. Save SpaceThe tunnel is supported by iron wires and can be stored after folded, this which can greatly save your space. When you need to use it, just untie the rope. Widely ApplicableEach tunnel measures approximately 3.88" in diameter x 11" in length. When unfolded and the hole in the middle measures 5.1" in diameter. This cat tunnel is designed for all small animals such as cats and kittens, dogs and puppies and rabbits to play and stay in. Playhouse and Refuge in one!