The cat tunnel is designed with 3 junction tunnels and a central peek-a-boo opening on top,each tube is about 11.81 inches long and 9.84 inches wide..Made of tear-resistant polyester,reinforced with metal wiring to stay its shape and stands up ,add to its strength.It is durable and comfortable, there is no need to worry about scratching and deformation..Promotes play and exploration,three junction tunnels, built-in crackle paper with a ball,which catches cat's natural instinct and provides your kitty more ways to have fun.Extension tunnel for hiding out, exercising or sleeping..Combine this tunnel with other toys to add more fun to your kittens.It will provides hours of exercise and self-amusement when you are busy not at their around.Release cat's energy, stabilise their nervous Emotion, increasing their movement to encourage daily exercise..Spring steel frame pops out and retracts easily , our tunnel folds down small in seconds for easy travel and storage,so you can take your tunnel on the go and keep your pet engaged anywhere!