JW Hol-ee Roller X is a unique, thick rubber ball for dogs. It's tougher and thicker than the traditional Hol-ee Roller. This product is designed for tough dogs and tough chewers. Hol-ee Roller X has strategic cut outs covering the ball so the dog can grab it pick it up, also great for games of tug-of-war. The cut-outs can also be easily filled with treats or small toys for long lasting boredom-busting fun! Available in Black or Blue. 13cm.