Hard material, high strength, good durability, can withstand heavy pressure Comfortable handle, polished without burrs, and does not hurt your hands When the small elbow or piston flattening affects the sound, use a sheet metal ball of suitable to reach into the small elbow flattening point and push it up Wind instrument repair parts, suitable for trumpet and French horn for friends, family, music lovers. Material: Alloy + Wood colour: silver + black Package Contents: 1 x Elbow Repair Handle 2 x Metal Balls Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.