Koh Fit Stress Ball for Adults - Stress Reliever Squeeze Balls - Bonus 18-Page Hand Exercise Therapy Ebook PREMIUM - Unlike cheap stress balls, ours are smooth in hand & don't get sticky or smelly when used! DEVELOP STRENGTH - Effective physical therapy & injury rehabilitation tool for hands and forearms. MADE TO LAST - Premium quality, extra durable materials, soft gel core. 2.36" in diameter. HAND EXERCISE GUIDE - 18-page ebook with exercises for grip strength, hand mobility and joint pain. 100% RISK-FREE PURCHASE - Youll be secured by our 90 DAY money back satisfaction guarantee!