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 favorite 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.