High QualityThe tennis trainer base is made of high density material which is very strong and durable. The tennis rebound ball is made of chemical wool fabric, which has strong wear resistance and good elasticity. The attached elastic cord is thick enough and durable. In short, the tennis set is of good quality and practical. Water inlet and outletThe tennis training equipment is equipped with a water inlet and outlet. By filling the trainer with water or sand and then creating a non-slip design on the floor, the stability of the trainer base is improved. The spherical groove design goes perfectly with the attached tennis ball. Self-taught tennis trainingBounce tennis with a rope is very useful for individual tennis training. It can improve your concentration, exercise ability and hand-eye coordination. Simple and practical. Of course, you can also use it to master tennis skills in the self-study process. Unique and practical designThe base of the tennis training set has a round hole design. Simply attach the bungee cord to the tennis training device ring to start a single tennis training session. The handle design on the side of the training device makes it easy to carry the tennis training device. It can also be used to increase the load on the exercise machine and increase stability. Portable SetThe tennis training set is very portable. Before filling with water and sand, the tennis base is lightweight and easy to carry. You can easily take the tennis trainer outside with you and start individual training. In addition, the accessories for the tennis training device are easy and convenient to store.