Feature: 1. Made of high‑quality materials, durable, training tennis ball with string, very light and easy to carry. 2. Easy to use, tie the ball to the base with elastic cord on it, no need to pick up the ball. 3. Multifunctional tennis practice tool, self‑learning training rebound tool, can practice all your tennis skills. 4. For beginners and intermediate tennis players, the elastic rope tennis trainer is a good teaching tool. 5. It is not restricted by the venue, fit for tennis/basketball courts, driveways, garages, basements, fitness rooms or other open spaces. Specification: Item Type: Tennis Ball with String Material: Rubber+Fabirc+Elastic String Color: As Picture Shown Ball Diameter: Approx. 64mm/2.5in String Length: Approx. 3.8m/12.5ft Weight: Approx. 77.0g/2.7oz Elastic Reference: about 130cm/51.2in (2.54m/8.3ft height fall) Package List: 1 x Tennis Ball with String