Aichuang Tennis Ball and String Replacement

Tennis material: Replacement ball for Tennis Trainer is made of high-grade rubber and high-quality woolen cloth, It is more durable and stronger than other tennis balls. Easy to use:Just tie one end of string to the tennis ball and fix the other end on racket or ground to start training without picking up the balls frequently, which can improve your practice efficiency and enhance your tennis skills.,Tennis material: Replacement ball for Tennis Trainer is made of high-grade rubber and high-quality