4 Packs Tennis Training Ball with String Tennis Trainer Balls Self Practice Trainer Tool Tennis Ball Training Equipment

Tie the ball to the base by rubber band, no need to pick up the balls frequently^
Training tennis with string, very lightweight, easy to carry^
The trainer is a great teaching tool for beginners and intermediate tennis players.^
Including 4 Pcs training tennis with string^
Multipurpose trainer for practicing all your tennis skills