Function and Benefit: Keep your fingers,forearms,and hands stronger while easing stiff joint pain.Use the all three balls to achieve variable resistance training. Improves your grip and finger strength , which benefits rheumatoid arthritis,rock climbing,fitness ,carpal tunnel rehabilitation,golf,violin,Tendonitis,handball,guitar,piano,surgery recovery,shooting,table tennis,and gymnastics . Color-coded balls identify the level of flexibility . All balls are the same size because of their ergonomic design , they are the correct diameter to fit comfortably in your hand as you exert force . Product Specification: Single Ball Dimensions: 2x2 inches ; 2.4ounces Shipping Weight: 12.3 ounces Storage Methods: Store in dark enviroment and avoid sunlight. Warranty Guarantee: 100% lifetime warranty. If you are not satisfied with your purchased or the item didn't meet your expectation , please contact us and our customer service team will offer you a refund.
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