ITEM NAME:1 x O Shape Grip Hand Finger Forearm Strength Trainer Exerciser Gym, Red(50 Q9A5 1 x O Shape Grip Hand Finger Forearm Strength Trainer Exerciser Gym, Red(50 Q9A5 P7T2 Material: Silicone Lightweight, and easy to carry. It will build hand and forearm strength for added performance in any sport anytime, anywhere. It can develop serious hand strength, hand grippers is the perfect choice for you and your friends. Color: Red(50 lbs) Package include: 1 x Hand Grip Weight: app 94g Type: Finger Trainer External diameter: approx. 8.5cm Internal diameter: approx. 4.5cm Suitable for: Children's sense of training system; Hand postoperative rehabilitation exercise; Finger agility training, suitable for friends to practice magic; Hand massage, relieve fatigue and can promote blood circulation. Note: Light shooting 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.