4m rubber rope, good elasticity and long service life. Multi purpose tennis trainer ball for practicing all your tennis skills, perfect for training with the elastic rubber rope. Do not need tennis partner, you may have tennis training at all time. Especially to improve tennis players stroke action, footwork and hitting precision control. Great teaching tool for beginners and intermediate tennis players, suitable for indoor and outdoor training and practice. Features: 1. 4m rubber rope, good elasticity and long service life. 2. Multi purpose tennis trainer ball for practicing all your tennis skills, perfect for training with the elastic rubber rope. 3. Do not need tennis partner, you may have tennis training at all time. 4. Especially to improve tennis players stroke action, footwork and hitting precision control. 5. Great teaching tool for beginners and intermediate tennis players, suitable for indoor and outdoor training and practice. Please allow slight error due to manual measurement. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.