NACOCO Tower of Tracks Cat Toy Pet Toy with The Balls Pet Amusement Pet Interactive Board Game Toys Cat toy,Three layer tower stack,The ball is inside, the cat catch the ball, the ball will roll Stacked play station perfect for one or more catsThree levels for exciting fun Very interesting intellectual toys, cat will crazy for it The top diameter6.3 inchesThe bottom diameter 9.84 inchesHeight5.51 inches Material: high grade PP