Wide Range of Use :The tennis ball can be used for outdoor training, such as parks, tennis courts,back gardens. It suitable for Beginners Sport Exercise

Convenient to Use: The tennis ball with string is specially designed for single practice tennis training , it needs to be used in conjunction with a tennis trainer tool .They're easy to use, don't spend time picking up balls, and improve your training efficiency

Wide Use: Tennis training balls are suitable for professional training and daily exercise use to improve your concentration, athleticism and hand-eye coordination