Four-finger Finger Expander Guitar Ukulele Piano Span Practice Finger Cover

Material:ABS
Description:
1. Unit weight: 38g
2. Specifications: standard model (unisex, suitable for those with thick fingers), standard model bold (unisex, suitable for thick hands), children (suitable for children under 1.4 meters)
3. Uses: expand fingers, exercise span, stretch ligaments
4. Features: can quickly open fingers, increase span, make fingers more flexible, elastic bar, strong and durable, round design does not hurt fingers, comfortable and reliable, adjustable ring spacing
5. Note: use when not practicing the piano, not wear when playing the piano