Professionals Recommended: Hand Yoga Is Being Used Many International Professionals In Various Fields Such As Musicians, Physical Therapist, Doctors, And Technicians For Their Healthy Hand And Finger. High Grade Material: Finger Band Is Made Of Silicon With Great Elasticity And High Grade Neoprene And Strap Make The Product Perfect For Anyone Best Hand Exerciser: You Can Train Fingers Individually Or Together With Different Tension Force.It Is Mainly Focused On The Fingers And Overall Part Of Hand Rehabilitation And Exercise Of Muscle. Material: Silicone + Alloy + Cloth Size: 20lbs-Green; 40lbs-Blue; 60lbs-Red; 75lbs-Black Weight: 110g 20lbs, suitable for training finger flexion, extension and abduction in the early and middle stages of rehabilitation 40lbs, suitable for middle and late rehabilitation training or daily exercise for women 60lbs, suitable for men's daily exercise, fitness use 75lbs, suitable for strong men's exercise, fitness use Package list: 1 x Finger Extensor Exerciser