Description: Passing time while thinking or being bored will bring more fun and feel a lot of relaxation.It can effectively alleviate sore muscle strains such as muscle bone caused by long-term use of fingers. compatible adults and children , you can carry them in your trouser pocket. Undoubtedly, our product can be used compatible stimulating the acupuncture points of the palm due to the bump design. And it is safe and soft to use due to the high-quality materials are used. It is made of silicone, is comcompatibletable to use. The length of the product is 10.5 cm, the width is 9.5 cm and the thickness is 3 cm. Our product is suitable compatible hand relax. Item Name: Finger Exerciser Ball Material: TPR Features: Finger Training, Waterproof, Portable Purpose: Grip training, muscle massage, stimulating feeling, etc. Material: TPR Hardness: Blue (Soft), Green (Moderate), Orange (Slightly Hard) Color: Blue, Green, Orange Size Details: 10.5cm x 9.5cm x 3cm/4.13" x 3.74" x 1.18" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Finger Exerciser Ball