ITEM NAME:30KG Professional Strength Finger Palm Hand Grip Palm Power Training Rubber F9N4 30KG Professional Strength Finger Palm Hand Grip Palm Power Training Rubber F9N4 Lightweight, easy to carry Made of high quality and durable material Will build hand and forearm strength for added performance in any sport anytime, anywhere Ideal gift choice for your friends Can develop serious hand strength, hand grippers is the perfect choice for you 100% Brand New Weight Resistance: 30kg Outer Diameter: approx 0.3 inch / 7cm. Package Includes: 1 x Hand Grip Power Training Ring Note: Random color, don't accept the specified color. 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.