JW Holee Roller Small 9cm JW Hol-EE Roller is a fun, versatile dog toy with the durability you've been searching for. Rubber gives it strength, bounce and a soft texture The unique open design allows you to stash small treats or kibble inside for hours of entertainment for your dog. It is non toxic, durable, rubber and super-stretchy. A do-it-all multipurpose dog toy! It's a fantastic treat ball, wonderful training aid, great for fetch, toss and tug, chewing and teething.