colour: black Material: plastic size: 9cmx8cmx2.5cm Package Contents: 1 x finger exerciser Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Designed to increase the strength of the fingers, wrists and forearms Exercise each finger trainer individually, or the entire hand arm strengthener. Isolates and exercises each finger individually for strength, dexterity, and endurance. Develops outstanding hand trainer , wrist and forearm strength. Whether you are warming up pre-show or conditioning when you're from your instrument, the is the ultimate portable workout. At the office, at home or on the train, you can keep up your finger, hand and forearm hand Grip strengthener and coordination. Perfect for beginners and those recovering from surgery our carpal tunnel the light resistance trainer offers 3 lbs. of tension. The medium level has 7 lbs. of tension and the heavy hand strengthener has 11 lbs. of tension. Ergonomically designed with a secure material, the hand strengthener provides a comfortable grip.