4PCS Tennis Training Ball Durable Replacement Balls with String for Beginner Single Player Practice Gear Yellow

The elastic rope is made of rubber material, which can give you a comfortable hitting experience every time Suitable for everyone Professionals and beginners can use rebound ball to play tennis indoors and outdoors to improve hand and eye coordination. Suitable for people of all ages, such as office workers, community seniors, school students, etc Tennis training equipment with cords usually have longer cords. You can hit the ball against the wall (or not hit it), and then retract the ball with a string, which takes up a small space, and is easy to carry, whether indoors or outdoors. It is easy to use to tie the end of the line without the ball to the fixing device, and then hit the tennis ball. Or tie the ball to the racket to practice tennis Excellent design, unlike other tennis balls, the bright yellow color on the ball can improve the accuracy of hitting even in low-light conditions