Age range:Adult Material type:Rubber Number of items:1 Sport:Tennis Batteries included?:No 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.Specification:Condition: 100% Brand NewItem Type: Tennis BallString Material: RubberString Length: Approx. 4m / 13.1ftProduct Size: Approx. 6 * 6 * 6cm / 2.4 * 2.4 * 2.4inPackage List:1 * Tennis Ball with StringNote:1. Please allow slight error due to manual measurement. Thanks for your understanding.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. About this item [Function]: 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 [with 4 Meters Rubber Rope]: The tennis ball for singles training is with 4 meters rubber rope, good elasticity and long service life [How to Use]: Tie the replace tennis ball to the base by rubber band, no need to pick up the balls frequently; Easy to install and replace [Reliable Material]: The tennis trainer rebound balls are made of safe and durable materials, not easy to break or corrode, and with nice elasticity [Great Teaching Tool]: Great teaching tool for beginners and intermediate tennis players, suitable for indoor and outdoor training and practice [Function]: 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 [with 4 Meters Rubber Rope]: The tennis ball for singles training is with 4 meters rubber rope, good elasticity and long service life [How to Use]: Tie the replace tennis ball to the base by rubber band, no need to pick up the balls frequently; Easy to install and replace [Reliable Material]: The tennis trainer rebound balls are made of safe and durable materials, not easy to break or corrode, and with nice elasticity [Great Teaching Tool]: Great teaching tool for beginners and intermediate tennis players, suitable for indoor and outdoor training and practice