■ 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-like black, and the receiving cups are silver and round, with a standard 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' trumpets. ★ These are products from an overseas manufacturer, so the stone parts may 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 be responsible for your own actions. ★ They will be shipped via Yu-Yu Mercari delivery service.