Perfect for any high school girls' and 14-and-under boys' and girls' water polo game, the KAP7 compact size 4 water polo ball comes in a variety of paneled colors. This top-quality water polo ball is a favorite among water polo players, coaches, and officials. Features natural rubber. Buffed surface for grip. Details size 4. Nfhs approved. USA water polo approved. Official ball of the collegiate water polo association.