If your four-legged friend likes a challenge, then hell love Kruuses Buster Treat Ball. Patented maze design slowly releases treats, so your buddy will have to work for that delicious treat making it taste even better. Made of durable ABS plastic. Sizes: Small (4.5 approx. dia.), Large (6 dia.). Color: Red. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Size: LARGE. Color: Red. Type: Toys.