Enhance Hitting Power: The tennis serve training tool is designed to provide resistance when hitting the ball, helping players build strength and gradually increase their hitting power. Improve Accuracy: Using this tennis training tool encourages players to focus on contact point and swing angle, which helps improve shot accuracy and control. Versatile Use: In addition to hitting practice, this tool can be used for arm, wrist, and shoulder strength training, as well as flexibility exercises. Premium Material: Made of silicone material, the tennis training tool offers high flexibility, is easy to handle, and built to last. Package Includes: 1 Tennis Training Tool Ideal as a gift for family and friends on birthdays, holidays, or special occasions. Specifications: Material: Silicone Size: 1 Ball: 58 cm / 22.83 inches Note: Slight variations of 1–2 cm (0.39–0.79 inches) may occur due to manual measurement.