DescriptionRecommended by professionals: Hand yoga is being used by many international professionals in various fields, including musicians, physical therapists, doctors, and technicians, to maintain the health of the hands and fingers. PREMIUM MATERIALS: The finger straps are made of very elastic silicon, high-grade neoprene and straps make the product a perfect fit for anyone Best Hand Exerciser: You can train your fingers individually or together, using different tensions. Focuses primarily on the fingers and part of the overall hand rehabilitation and muscle building. Material: Silicone + Alloy + Cloth Size: 20lbs-Green; 40lbs-Blue; 60lbs-Red; 75lbs-Black Weight: 110g Packing List: 1 x Finger Extensor Trainer