They are designed to provide a secure and stable connection, ensuring that your instrument operates smoothly. These screws are Ideal for regular maintenance and repairs, helping you maintain the quality and functionality of your trumpet. Features -Color:Silver -Material:Metal -Size:2.10X2.10X1.30cm/0.83X0.83X0.51in -Size:2.00X2.00X0.70cm/0.79X0.79X0.28in -Consistent stability: provides a secure fit, preventing the trumpet valves from loosening and ensuring consistent performance -Focus : solves the problem of traditional valve screws loosening, allowing musicians to play without frequent adjustments -Broad usability: ideal for school bands, personal practice, and performances, meeting various needs for a better playing experience -Durable and reliable: durable material ensures the product's durability and stability -Simple installation: the thoughtfully designed screw caps facilitate quick and easy installation, saving time for musicians Package list: 6 x Trumpet Valve Buttons