Features 1. Tennis Practice Equipment: Our tennis self trainer includes 1 tennis ball with string and 1 durable PE material base. This tennis trainer set helps improve your personal tennis skills when you don't have a partner or access to a tennis court. 2. Stable Design: The tennis ball practice trainer is made of high-density PE plastic with a non-slip bottom. Remove the cap, fill the base with sand or water to add weight. The heavy base and non-slip bottom provide stability and prevent sliding during use. 3. Portable and Convenient: Designed with a kettle-like structure, this tennis practice device allows you to easily pour out the water or sand after training. Wrap the rubber string around the trainer for compact storage. The side handle makes it easy and comfortable to carry. 4. Solo Training: No partner or tennis court needed—just an open space and this training set. The ball is launched and automatically rebounds via the elastic string, making it easy to practice your serve and strokes. 5. Ideal Tennis Gift: A great gift for tennis players, families, and children. Helps improve swing rhythm, footwork, and technique. Suitable for indoor and outdoor use in locations such as playgrounds, gardens, parks, and tennis courts. Specification Material: PE Color: Blue Size: Base: 21 x 5 cm, Ball: 7 cm Weight: 190 g Package Includes: 1 x Tennis Trainer Base 1 x Tennis Ball