leaton Hand Exerciser and Strengthener Grip Rings - Forearm Grip Strength Strengthener - Hand & Finge Exerciser Grip Strengthener (20LB-30LB)

100% Brand new and high quality. Light weight, durable, easy to carry. Made of high quality and aging resistant material, durable to use a long time. It can develop hand strength, increase finger dexterity, promote blood circulation, besides, deflate tension when working under stressful situations. Material: Silicone Specifications: Material: Silicone Color: Gray/ Red / Blue / Orange / Purple / Yellow / Green Force: 20-80 lbs Outside Diameter: 10.5cm/4.13" Inside Diameter: 5.5cm/2.28" Thickness: 2cm/0.79"