Specifications: Two Levels--Two levels for exciting fun, the balls are inside. When the cat catch the ball, the ball will roll but will not roll out. Bright color, very interesting and intellectual toys, entertain your cats and protect your furniture from clawing. Sturdy Construction--This track cat toy is made of ultra-strong, tear-resistant PP that stands up to crazy cat scratcher antics, detachable multi-layer for easy cleanup and with non-slip base pad to prevent slippery. Sturdy construction stands up to vigorous play for one or more cats. Stimulates Cats Senses--The tower of tracks cat track toy stimulates your cats senses and hunting instincts, this will increase their sensitivity and will not cause persecution on the furniture at home. Self-amusement for Cat--This tower of track ball toy provides hours of exercise & self-amusement for health care and elimination of boredom and pet depression since your cat can play alone when master is not at home.