ITF Approved HEAD PRO Hard Tennis Balls These balls were used for practice, etc. on an Omni court for about 3 months. *Condition may vary slightly depending on the ball. Please judge the condition from the actual product photos. There are 170 balls, so you can use them for serve practice, ball feeding practice, etc. You can also use them for baseball toss batting practice. Also, the lowest price for 48 balls on Kakaku.com is about 6,900 yen, which is about 144 yen per ball. HEAD PRO balls are high-quality practice balls that prevent air leakage by about 33%, enabling stable bounce and control for a long time. High-quality materials are also used for the felt, achieving durability and the feeling that Japanese players prefer. "HEAD PRO" was used as the official ball at the "China Open 2014" held in Beijing, a WTA Premier tournament (women's). As they are ITF-approved balls, they can of course be used as match balls in international tournaments. In Japan, they are positioned as practice balls because they are not JTA official, but their high grade has been proven. Usage: Hard court Type: Pressure ball