Petlinks Silly Chute Activity Cat Tunnel has crinkle, fringe, dangling ribbons, slinky like open springy end that really excites cats for endless pouncing, playing, batting, and hiding. This update on a favourite tunnel expands to 20 inches long when cats run through the tunnel a rustling sound is produced, a proven attractant to cats, it sounds like prey scurrying through the grass and leaves. Satisfy your cat's need for stimulation with our easy to expand and collapse Silly Chute Activity Tunnel.