Package Content:1PC Tennis Training Tool(including base+tennis with string)Specification:Product name: Tennis Ball Singles Training Practice Retractable Convenient Training Tennis Tool Sport Tennis Ball Singles Training Practice Retractable Convenient Training Tennis Tool SportBase: High quality PETennis: wool+rubberString length: 4mBase Size: 21*5cm(width*thickness)Tennis diameter: 6.35-6.67cm: blue base+green tennisFilling: can be filled with earth, sand, waterSuitable for: tennis trainingDescription:In less than a month you can have what it takes. The Tennis Training Tool has a cord of 4 meters, which the tennis ball is attached to. This elastic cord can be stretched up to more than 4 meters. When the ball is knocked away, it will always come back, so that it can be hit again afterwards. This makes it possible to practice different strokes with the Tennis Trainer. The speed of hitting and footwork can also be trained with the Tennis Trainer.The basis of the Tennis Training Tool is a round disc with an anti- layer on the bottom. When placed on the ground, it will not shift quickly during use. The base can also be used to store the tennis balls and to roll the cord around when not in use.The special design of the water inlet and outlet design completely solves the problem of difficulty in filling and filling the water in the past.Feature:Train everywhere and whenever you want, Features everything a Tennis Player absolutely needsTake your Tennis Skills to the a level in no time,Train without a companion.A special device for connecting anti-wrapping hooks is added to the outside of the ball seat. When used with anti-wrapping hooks, the rubber band will no longer be entangled.Adding 2 large-area non- EVA at the bottom has excellent damping effectErgonomically designed grip makes you more comfortable and convenient to carry. tennis design, perfect fit with tennis.Note:1.All dimensions are measured by hand, there may be 2-3 cm deviations; 2.Due to the difference between different monitors, the picture may not reflect the actual of the item. Thank you! a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a