Description: 【Tennis Trainer】: Floor tennis trainer rebound ball, a very convenient tennis trainer. The tennis trainer for practice training, is sturdy and durable, playing without being restricted by place/person. 【Exercise Your Reflexes】: The tennis training machine will improve your reflexes and hand eye coordination. Stability, focus, quick, and training hitting, can be played with two or even more people. 【Durable and Stable】The Tennis Trainer base can be filled with water or sand and become heavier instantly to provide stable support for training. This design keeps the base from shaking while training. 【High Quality】: Made of ABS Nylon material, durable, The small ring on the side is for hanging the ball rope. Great accessories for tennis training, can help to perfect skill of tennis! 【Training Equipment】This Trainer can be played indoors and outdoors. The tennis trainer support base is lightweight and portable, suitable for many places like gardens, parks, etc. Specification: Material: ABS Nylon Base Size: 20cmx5cm/7.87inchx1.97inch Package Includes: 1 Trainer Base 1Pcs Ball Note: Please allow slightly errors due to manual measurement and different monitors.