Description: 【Easy to Use】: Tennis trainer ball with string is convenient for training, tied to the base (not included), no need to pick up the ball frequently. Great equipment for practicing your skills on your own. 【Material】: Tennis training ball with string is made of high quality material, lightweight and durable, very lightweight and can be carried anywhere. 【Portable】: The tennis trainer can be easily stored and carried, it can be installed anywhere and stored easily. 【Suitable】: Tennis ball rebounder string is suitable for tennis coaches, suitable for various purposes and improving your tennis level, very suitable for beginners as well as intermediate tennis players. 【Perfect Gift】: Tennis Self Trainer Practice Ball is a multi purpose trainer for friends and family who love to play tennis. Specification: material: rubber Size Chart: Diameter: 6.35cm/2.50inch Rope length: 400cm/157.48inch Package Includes: 1 Tennis Ball with Rope(6 Pack) Note: Please allow slightly errors due to manual measurement and different monitors.