Get your fetch on with Chuckit! Ultra and Chuckit! Squeaker balls. Your dogs will love you and you will love these balls! Top quality, non toxic rubber that are long lasting and almost indestructible. These are our favourite brand of balls for our little power chewer. Comes in a range of sizes, use with or without the ball launcher but both ball styles are compatible. Sizing chart available in images. S - 5cm, M - 6cm diameter.