Your movements control the bounce of the inner balls Add more bang to your ass play. Weighted balls, one inside each round chamber, lets you enjoy bouncing & rolling sensations unlike any other butt plug. The faster you thrust and move the more intense the bounce. 3 graduated sizes to train and ease your way into more intense anal play. Suction cup base to securely mount it, for more ass play options. Weighted beads, encased in firm but flexible silicone.