■ Set of 3 Trumpet Piston Finger Button Parts ★ These are trumpet piston button accessory parts purchased from an online shop. ★ The stone color is orange moonstone, and the receiving cup is gold-colored alloy, round and regular in shape. ★ One piece has peeling plating on the side (see image 2). ★ The set of 3 weighs approximately 14 grams. ★ They were installed on a current model YAMAHA YTR4335GⅡ, but it is unknown if they can be installed on other Yamaha models, Bach, or other manufacturers' trumpets. ★ Image 4 shows an example of them installed on a current model Yamaha 4335GⅡ. ★ Please understand that we cannot offer a warranty or refund if the screw threads or the instrument itself are damaged due to forced installation. Please understand and take responsibility for your own actions. ★ We will ship via Yu-Yu Mercari Mail from the post office.