Tennis material: high-quality rubber is used as a lining to ensure the elasticity, stability and durability of the ball. The outer layer is made of high-quality chemical fiber, which greatly improves the wear resistance of the ball surface.AICHUANG Easy to use: Use rubber bands to tie the ball to the base, hit the tennis racket or hand racket to the wall or throw it into the distance, use the perfect resilience of the rubber and the pulling force of the rope to put the tennis back into your hand,Without having to pick up the ball often Training accessories: Ball diameter 6.5-6.8cm (2.56-2.68in), string length 3.8m (12.47ft), rope tennis is a good tennis training accessory to practice many tennis skills. You can use all your tennis skills to practice. Application: For beginners and intermediate tennis players, the coach is a good teaching tool. This is a safe tennis game, ideal for indoor and outdoor sports. Purpose: Line tennis is a tennis training accessory, which can help you better individual training tennis skills. At the same time, you can throw one of them to your pet so that the pet can happily train with you. Of course, when your training is over,you can also use tennis to perform comfortable foot and waist massage to relieve your fatigue Specification: Material: Rubber + Felt Colour: Green Ball Diameter: approx. 64mm / 2.5inch Cord Length: approx 4m (2.54 meters height free fall, the ball bounce 130cm) Features: The ball is made of high-quality rubber and felt, lightweight and durable, easy to carry. With a rubber band ball tied to the base, there is no need to spend time picking up the ball, making it easier to train. Improve reaction speed and hand-eye coordination. Very suitable for tennis learners and tennis teaching training, very suitable for indoor and outdoor practice.