Description: 【Tennis Trainer Aid】: Floor tennis swing trainer, very convenient tennis hit training tool. A portable tennis trainer for topspin, stereotype, practice training, suitable for many places both indoors and outdoors, such as home, gym, garden, park, etc 【Tennis Training Tool】: This professional tennis training machine will improve your response ability, predictability, and hand eye coordination. Stable, fast, self study tennis 【Tennis Swing Stability】: The swing trajectory of this tennis trainer is very stable, swinging back and forth, suitable for kids, adults, old men, beginners, and training fixed movements 【Quality Material】: This pickleball trainer rebound ball is made of quality spring steel, and PP base material, sturdy. Adjustable height makes the versatile swing training gear very convenient to use 【Easy to Use】: The tennis ball trainer partner sparring device is convenient for training without the hassle of picking up the ball. Great tennis training equipment for practicing your tennis skills on your own Specification: Material: Spring Steel, PP Size Chart: Height (Adjustable): 65cm-95cm/25.59inch-37.40inch Package Includes: 1 Tennis Trainer