Recommended by professionals: Hand yoga is being used by many international professionals in various fields, including musicians, physiotherapists, doctors, and technicians, to maintain the health of the hands and fingers. PREMIUM MATERIALS: The finger straps are made of very elastic silicon, premium neoprene and straps make the product suitable for anyone. Best Hand Exerciser: You can train your fingers individually or with different pulls. The main focus is on hand rehabilitation and muscle building of the fingers and integral parts. Material: Silicone + Alloy + Cloth Sizes: 20lbs-green; 40lbs-blue; 60lbs-red Weight: 110 grams What& 39;s Included: 1 x Finger Extensor TrainerProducts from WUZHOU& 39;s store"