1. Material: resin 2. Length: Small 13.9cm, Medium 14.5cm, Large 15.5cm 3. Applicable people: small children, medium adults, large ones with thick fingers 4. Scope of application: saxophone, ukulele, electric guitar, western keyboard, etc. 5. Features: easy to carry and use, to avoid finger strain, a few minutes a day, the fingers will change significantly, more diastolic release, improve finger span and flexibility 6. Usage: Use it in the non-piano state, for four minutes to the second knuckle, you can do other things during the period. Cross the hole sleeve next to the two fingers, apply force to the palm, increase strength and stretch the ligament
