★ Used Hard Tennis Balls DUNLOP St. James 40 balls, equivalent to 10 cans ■ St. James balls offer excellent feel and durability, making them long-lasting practice balls. They are used by many tennis schools and clubs, making them high-quality practice balls. They will be shipped loose in a cardboard box. ■ Air pressure is approximately 70-80% of the original pressure upon opening. While there are no balls with the logo completely worn off, some have slight fuzziness. These are suitable for ball machines, transitioning from kid's balls, and beginners. ■ They can also be used by attaching them to chair legs to prevent floor scratches and reduce vibrations to lower floors in apartments, or by taping them together to use as a finger pressure tool. ■ Approximately 700 yen per can (4 balls).