Description These steel valve springs are designed specifically for euphoniums and baritones with three or four valves. Crafted to ensure smooth and responsive action, they are essential for maintaining the optimal performance of your brass instrument. The springs are durable and reliable, making them a choice for both professional musicians and students. Features -Color:Silver -Material:Special steel -Size:3.50X3.00X2.50cm/1.38X1.18X0.98in -Versatile use: ideal for both beginners and professional musicians, these springs are designed to enhance the performance of your brass instrument -Precision design: crafted with precision, these springs ensure responsive keys, making your playing experience smoother and more enjoyable -Enhanced sound: unique tone adjustment capabilities allow your instrument to produce richer, fuller sounds, adding depth to your music -Easy replacement: these key spring accessories are easy to replace, making maintenance and repairs a breeze -Wide application: suitable for various musical settings, including school bands, personal practice, and live performancesPackage list: 5 x trombone springs