Product information: Material: PE Color:Round base + ball Size: 21 * 21 * 5cm 1. GAME, FUN AND TRAINING PROGRESS - In order to offer you the problematic tennis experience, we rely on emotional brand quality water-fillable containers for the tennis ball and round off the set and remain steadfast in all kinds of hits. 2. WHERE & WHEN YOU WANT - From now on you can practice your forehand and backhand flexibly at any time, be it in the garden, in front of the driveway or on the tennis court. Your friends or your partner will be bare-bones asking so already bare, you could make progress; 3. Anti-slip design: The bottom of this tennis trainer uses a non-slip design to increase stability by increasing the friction with the ground. On the underside of the tennis trainer there are two large, non-slip EVA materials that are extremely robust. 4.Anti-twist design: the outer part of the tennis training device is specially equipped with a device for connecting the anti-wrap hook, which is the same as using the anti-wrap hook.