■ Trumpet Piston Finger Buttons Valve Parts Set of 3 ★ These are trumpet piston button accessory parts purchased from an online shop. ★ The stone color is onyx-style black, and the receiver is a silver round shape. ★ They were installed on a current model YAMAHA YTR4335GⅡ, but it is unknown whether they can be installed on other Yamaha models or other manufacturers' instruments. ★ These are products from an overseas manufacturer, so the stone parts seem to have rough polishing and finishing. ★ The set of 3 weighs approximately 11 grams. ★ Please understand that we cannot provide any warranty if the screw threads or the instrument itself are damaged due to forced installation, and please do so at your own risk. ★ They will be shipped via Yu-Yu Mercari delivery service.