Durable ball and base The ball is made of imported natural rubber. Strong and durable. The base is made of plastic, is durable and portable. Lightweight and portable Very light when empty, so that this tennis trainer can be easily stowed away and carried. Fits easily in a tennis bag. Developing skills Our tennis baseboard can improve your concentration, your athletic abilities as well as your hand and eye coordination and develop sports interests. Handy Tool A great tool for practicing your strokes, developing a faster swing speed, or just warming up. Product descriptions This is the perfect portable tennis training aid. Just hit the ball and it will come back to you Fill the base with water and it will instantly become heavy enough to hold the device in place. Made of plastic and rubber, it is durable and portable. Great teaching tool for beginners and advanced learners, your best choice Features: 1. PRACTICAL TOOL: A great tool to practice your strokes, develop a faster swing speed, or just to warm up. 2. Durable ball and base: The ball is made of imported natural rubber. Strong and durable. The base is made of plastic, it is durable and portable. 3. PORTABLE: Very light when empty, so it can be easily stored and transported. Fits easily in a tennis bag. 4. SKILL DEVELOPMENT: It could improve your concentration, athletic ability, hand and eye coordination, and develop the interests of the sport. Specifications: Item: Tennis Trainer Material: plastic and rubber Color blue Basic size: Approx. 21 * 21 * 5cm / 8.3 * 8.3 * 2.0 inch Line length: Approx. 270 cm / 8.9 ft Approximate weight. 193 g / 6.8 oz Package list: 1 x base 1 x tennis ball with black rope