The Four-Pack Mini Tennis Balls from Hyper Pet are replacement balls for the K-9 Kannon Mini. Ideal for small dog breeds, these mini-sized balls feature a durable 95/5 rubber/polyester construction that is safe for your dogs teeth. Four per pack. Imported. 1.9 -dia. Available: Green, Pink, Orange. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Color: Orange. Type: Toys.