specification: Item Type: Hand Grip Ball_x000D_Material: TPR_x000D_Size: Approx. 6cm / 2.36in Features: 1Calm Down: Each squeeze promotes positive energy, increases your concentration, and stimulates healthy thoughts that calm the mind. 2Hand Exercise: Hand therapy stress ball is a simple exercise tool for performing simple finger exercises, which help to relieve tension, stress, and anxiety. 3Mobility Training: Hand therapy squeeze ball can training hand mobility, rehabilitation and strength, which is suitable for people in all ages and hand sizes. 4Relieve Pain: Hand therapy exercise ball can relieve hand and joint pain, improve hand grip strength and flexibility, which can effective prevents stiffness. 5Daily Use: You can use the grip strength trainer ball any time or any where, such as when you sitting at your desk, taking a bus or just watching TV. PackageList: 1 x_x000D__x000D_Hand Grip Ball