Product Description Specification: Material: TPR Color blue Size (L x W): about 12 * 6 * 9 cmcm Multifunctional: For the finger massage, rolling movements and gripping exercises. Also suitable for foot or back massage. Convex: Whole body convex massage, high clearance antennae, moderate hardness, durable deep massage acupuncture points without wear. These stress balls for hand balls can also help prevent mouse hand and reduce anxiety and increase blood flow and circulation in your hands, arms and fingers Occasion: the Hand exerciser kit is ideal for outdoor adventurers who enjoy rock climbing and strength training, for musicians playing the piano, guitar and for everyday stressed people Easy cleaning: wash all the body, avoid sticky products, not greasy, the dirty is easy to clean Four fingers: four fingers design, better finger firmness, prevent slipping Package includes: 1 x Finger Grip Ball Find answers in Product Info, Q&A and Reviews