This is an 8 inch erratically rolling, hard to pin dog toy ball designed with the idea of constant movement in mind. Being made of hard plastic makes this ball hard to bite and causes the ball to "squirt" out of dogs' mouths. Available in Purple, Red, Yellow or a money saving set of All 3 Colors! Additional Details ------------------------------ Product description: This is an 8 inch erratically rolling, hard to pin dog toy ball designed with the idea of constant movement in mind. Being made of hard plastic makes this ball hard to bite and causes the ball to "squirt" out of dogs' mouths. Available in Purple, Red, Yellow or a money saving set of All 3 Colors!