Adjustable Span Finger Palm Exerciser Multi-finger Tensioner Guitar Piano Trainer MFX5 - Grey

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1.Size and weight: 17*13.6*3.5cm, 148g.2.Material: copper+ABS.3.Function: satisfying the requirements of finger training of various musical instruments. Fully improve the accuracy, endurance, and explosiveness of fingers, palms, wrists, and arms in sports and other work, and fully reduce the vulnerability of fingers and wrist joints. Improve the general physical fitness, becaus...