Features: Single-player training: This is a multi-purpose tennis training ball, which is very suitable for single-player to practice all tennis skills. It is an excellent teaching tool for beginners and intermediate tennis-player. With elastic rope: the rebound tennis ball is equipped with a long rubber rope, which makes it easy for the tennis ball to rebound in a single training, just like someone is playing with you . There is no need to pick-up the ball frequently. Practice at any-time: Rope tennis does not need tennis partners. You can practice tennis at any-time, regardless of the weather, anywhere, indoor or outdoor, so-that you can get rid of the restrictions of no opponents and the space, and practice at any-time. Multi-purpose trainer: tennis ball is faster than playing with people, so it is very suitable for individual practice, especially to improve tennis-player' flexibility, stroke and precise control of stroke. Application scenario: The tennis training ball is very light and easy to carry. This tennis training tool is suitable for tennis court, garages, basements, fitness rooms or other open space. Specifications: Material: Chemical-Fiber Needled Wool+Natural Rubber Liner Diameter: 67mm/2.64inch Rope Length: 3.8m/12.47inch Package Includes: 2x Elastic Rope Tennis Ball note: Please allow 1-2cm errors due to manual measurement, make sure that your do not mind before your order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.