Aerial Yoga Hammock/Tennis Trainer | Trapeze Swing Sling Arial Rope Course Trapize Swivel Beginners Workout Air Door Mount Mysore Strap Swings Accessories PLENTY ELASTIC STRINGS - Package includes 1 x TRN PowerBase Tennis Trainer + 5 Elastic Strings + 1 Tennis Ball with Connector. We added extra elastic strings so you can attach even 2 or 3 elastic rope to one ball. This way, you can strike as hard as you can without the strings breaking and the tennis ball will rebound fast. Also, if one of the strings breaks, you can change it immediately. SOLO TRAINING - Our TRN Fill & Drill builds quickness, hand-eye coordination, and stamina. Will improve your concentration, athletic ability and develop interests of sports. Easy to use and convenient for training without picking ball, and it is lightweight and portable, helpful for single person practice. NO NEED PICKING UP BALL - This TRN PowerBase Tennis Rebounder is perfect for practicing tennis anywhere. It's super handy for single person practice that you needn't picking ball frequently. No need for a ball machine or a wall. The rugged, non-slip base is great for indoor and outdoor practice. The Power Base is perfect for ages 7 and up. ORIGINAL STABLE BASEBOARD - By practicing your tennis skills with the TRN Power Base Tennis trainer, you will gain quickness, hand-eye coordination and stamina! We recommend filling it with sand, but you can also use water or any weight on the back of the training tool so that it is heavy enough to allow the ball to rebound after striking. ORIGINAL STABLE BASEBOARD - By practicing your tennis skills with the TRN Power Base Tennis trainer, you will gain quickness, hand-eye coordination and stamin PERFECT GIFT - Great gift for your friends, family or kids who love playing tennis, and it can help to improve the action, footwork and hitting precision control of tennis. Suitable for many places like playground, garden, park ,etc. Used for plastic ground, sand, and grassland.PERFECT GIFT - Great gift for your friends, family or kids who love playing tennis, and it can help to improve the action, footwork and hitting precision control of tennis. Suitable for many places like playground, gard