Used HEAD hard tennis balls, set of 48. These balls were used in lessons once a week for six months, so they have a "T" mark written on them. They are especially recommended for seniors in the intermediate class, for ball feeding for elementary and junior high school students, for serve practice, and for warm-up balls. They can also be attached to the legs of chairs to prevent scratches. They are also just the right firmness for a back massage. - Brand: HEAD - Type: Hard tennis balls - Quantity: 48 - Condition: Used Thank you for looking. Type: Pressure ball Use: Hard court Price reduced.