The WESTERN HOME WH Cat Tunnels Tube Cat Toys is a great way to encourage your cat to be active. This toy features a large, durable polyester tube with a steel wire frame. Your cat will enjoy playing with this toy as it provides lots of fun and interactive features. The toy also features a 5.5-inch diameter hole that your cat can use to walk into and out of the tube. The toy also has a hanging ball on the exit which makes it even more interesting for your cat to play with.