3pcs Trumpet Key Buttom Piston Valve Screw Copper Accessories Part

Features: 3 pieces copper buttom for trumpet. The outside diameter of 21.8mm inner diameter of 6mm. Useful and necessary part for replacement. Specifications: Material: Copper Color: Item Size: 2.2 * 2.1 * 0.6cm / 0.8 * 0.7 * 0.2in Item Weight: 21g / 0.7oz Package Size: 6.5 * 2.1 * 0.8cm / 2.5 * 0.8 * 0.3in Package Weight: 22g / 0.8oz Package List: 3 * Buttom