3-Piece Trumpet Valve Finger Knobs, Color: Abalone shell

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Hand polished and made of zinc alloy, with natural stone material.
Trumpet Finger Key Button Cover Size: Approx. 1.5*1.5cm/0.59*0.59in
To replace old, broken and missing buttons
Helps to improve key precision and improve gaming fluency.
Fit for many models of trumpet finger button replacement and repair