1. Hand yoga is being used many international professionals in various fields such as musicians, physical , doctors, and technicians for their healthy hand and finger. 2. Finger band is made of silicon with great elasticity and high grade neoprene and strap make the product perfect for anyone. 3. You can train fingers individually or together with different tension force applied. 4. This perfect design leads you maximize motions of range in exercising. Adjustable wristband can bEwornby anyone with comfortable fit, regardless of wrist circumference. 5. Do not have to buy other item for your hand training. You can use it for your right and left hand training both with simple way at any place. Three tension options: 20lbs,40lbs,60lbs. Specification: Name: Finger Extensor Exerciser Material: Silicone, alloy, fabric Weight: About 110g Color: Green (20 pounds), blue (40 pounds), red (60 pounds) Package include: 1pc*Finger Extensor Exerciser Color: Green (20 pounds), blue (40 pounds), red (60 pounds) Package include: 1pc*Finger Extensor Exerciser