■ Set of 3 Trumpet Piston Finger Button Parts ★ These are trumpet piston button accessory parts purchased from an online shop. ★ The color is silver, and they are button-shaped (round) without stones. ★ The weight is approximately 24 grams for the 3 pieces. ★ There is some cloudiness in the plating. ★ In image 4, they were installed on the current model YAMAHA YTR4335GⅡ, but it is unknown whether they can be installed on other Yamaha models, Bach, or other manufacturers' trumpets. ★ 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 this and proceed at your own risk. ★ We will ship from the post office.