This is a fantastic and very funny toy ball! It can make sound when it is rolling. You can put food in it? then the food will leak out when your dog is playing with it. Your dog will go crazy and keep playing it without tiredness! A wonderful toy ball to train your pet's intelligence. <br /><br />Material: plastic <br />Color: black<br /> S <br />Diameter: 8 cm <br />Hole size: 1.8 cm <br />Suitable for small dog <br /><br /> M <br />Diameter: 9.5 cm <br />Hole size: 1.8 cm <br />Suitable for small and medium sized dog <br /><br />2*BALL<br /><img src="//agdetail.image-gmkt.com/m430/645/321/842321645/img/agdetail.image-gmkt.com/645/321/842321645/img/img6.eachbuyer.com/x9/p100/bw426_1.jpg" />                                                        <img src="//agdetail.image-gmkt.com/m430/645/321/842321645/img/agdetail.image-gmkt.com/645/321/842321645/img/img6.eachbuyer.com/x9/p100/bw426_2.jpg" />                                                        <img src="//agdetail.image-gmkt.com/m430/645/321/842321645/img/agdetail.image-gmkt.com/645/321/842321645/img/img6.eachbuyer.com/x9/p100/bw426_4.jpg" />