Item Description 7cm Strength Finger Hand Grip Muscle Power Training Rubber Ring Exerciser 100% brand new and high quality Material: Silicone Color: Green/Blue/Orange/Black Feature: 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 Idea gift choice for your friends Can develop serious hand strength, hand grippers is the perfect choice for you Outer Diameter: approx 7cm/2.76" Inner Diameter: approx 3.5cm/1.38" Package Included: 1Pc x Hand Grip Power Training Ring Note: 1.Please allow 1-3mm error due to manual measurement. Please make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you