HEAD CP tennis balls, 9; St. JAMES, 3 Used in lessons once a week for six months, so the letter "T" is written on the balls. Especially recommended for seniors in the intermediate class, for ball feeding for elementary and junior high school students, for serving practice, and for warm-up balls. Also good for attaching to the legs of chairs to prevent scratches. They are also the perfect firmness for a back massage. Thank you for looking.