Set of 8 tennis balls. - Brand: YONEX - Brand: St. JAMES - Quantity: Set of 8 Thank you for viewing. (Used) 8 hard tennis balls. Will be shipped via Yu-Packet Plus. Balls only will be shipped. ・Used for about 4 sessions of 2-hour practice, and then stored for a while. There is some variation in the frequency of use. I think they can still be used for serve practice, but please understand that there are individual differences. Other uses include: ・Youth baseball ・Tennis with children ・Communication tool with your dog ・Home rehabilitation for lower back pain, massage ・Diet ・Improvement of symptoms during labor ・Improved washing ability when used simultaneously with laundry Thank you. Purpose...Hard court Type...Pressure ball