Description: Baseball Trainer: baseball pitching bands for throwing resistance comes with a baseball, which can help you improve hand eye coordination, increase hitting power, and is used for throwing simulation and sports training. 3 resistances are optional: Yellow: 10 lb; Green: 20 lbs; Red: 30 lbs, you can choose according to your needs. The baseball trainer can also be used for arm extensions, extensions or wrist exercises. Portable: baseball exercise rubber bands are easy to store, carry and use. The structure is simple and can be easily connected to the fence for use, suitable for indoor or outdoor baseball and softball training. High Quality Material:elastic bands for baseball are made of soft rubber material, good , comes with a baseball, easy to train. Perfect Gift: resistance exercise bands for baseball is a surprise gift for friends or family members who love baseball. Specification: material: rubber Size Chart: Hose length: 1.2m/47.24inch Baseball diameter: 7.5cm/2.95inch Package Includes: 1 Baseball Throwing Trainer Note: Please allow slightly errors due to manual measurement and different monitors.