The Cannonball, is the new, quickest, and easiest way for rehabilitation, therapy, strengthening, toning, and warming-up of the shoulder and arm muscle's, and it's also just fun to play with. The Cannonball can be used by both men and women (youth, ages 12 and up). The Cannonball can be used for all sports that require the use and rotation of the arm's and shoulder's, such as baseball and softball.

• Instructions Included
• The Cannonball weighs 1 pound and is composed of solid rubber. 11"