Elevate your musical experience with the spring for trombone. Crafted with precision and using quality materials, this spring ensure durability and reliability, long-term use of your instrument. Providing a smooth and seamless playing experience, allowing you to express your musicality with enhanced performance. The feature adds richness and fullness to the instrument's sound, enhancing the joy of playing. With easy installation and compatibility with various brands of tenor horns and euphoniums, this spring offers convenience and efficiency. Rest assured, this spring has undergone rigorous testing and quality to ensure stability and reliability, giving you peace of mind. Features -Color:Silver -Material:Special steel -Size:3.50X3.00X2.50cm/1.38X1.18X0.98in -Inner diameter:5.5mm -Crafted with precision and using quality materials, this spring ensure durability and reliability, long-term use of your instrument. -Providing a smooth and seamless playing experience, allowing you to express your musicality with enhanced performance. -The feature adds richness and fullness to the instrument's sound, enhancing the joy of playing. -With easy installation and compatibility with various brands of tenor horns and euphoniums, this spring offers convenience and efficiency. -Rest assured, this spring has undergone rigorous testing and quality to ensure stability and reliability, giving you peace of mind. Package list: 1 x spring