StringyBall Stress Balls on a String (Set of 3) - Perfect For Stress Relief, Hand Exercise, Strengthening, Rehabilitation - Soft, Medium and Firm Balls with Exercise Guide - No Falling or Rolling Away : Amazon.co.uk: Sports & Outdoors
StringyBall Stress Balls on a String (Set of 3) - Perfect For Stress Relief, Hand Exercise, Strengthening, Rehabilitation - Soft, Medium and Firm Balls with Exercise Guide - No Falling or Rolling