Premium Material: Finger strengthener, hand gripper exerciser, made of high quality silicone material, high flexibility, smooth, with long service life. NOTE: Random Color.Design: The finger gripper is suitable for daily exercise or fitness, training, combination training is more effective and can use for a long time. Size: 10cmx8cmx0.8cm/3.94inchx3.15inchx0.31inch.Universal: The hand strengthener is ergonomically designed for most hand sizes, convenient and compact, and easy to clean.Portable and Lightweight: The finger strength exerciser is lightweight and portable, easy to carry, you can exercise anywhere. While walking, traveling (car, airplane, bus), office, or any place you want to exercise.Application: Grip and Stretch training strengthen your fingers, wrists and forearms. Suitable for sports like gymnastics, fitness, tennis, golf, baseball, boxing, rock climbing and musician like violin and guitar players. Specification: Material: Silicone Size Chart: Finger Gripper 10cmx8cmx0.8cm/3.94inchx3.15inchx0.31inch Package Includes: 1Finger Exerciser1 Hand Grip Note: Please allow slightly errors due to manual measurement and different monitors.