Features: Enhances your trumpet's performances with our high elasticity button springs, designed to ensure responsive key action and prolong the instrument's lifespans. Crafted from quality metal, these springs resist rusts and corrosion while maintaining excellent elasticity, making them a durable choice for any musician. With precise dimension and easy installation, these trumpet accessories are a must have for anyone serious about maintaining their musical equipment. Perfect for use in repairing or enhancing trumpets, these springs are essential for ensuring smooth operations during performances and practice. Great for professional musicians, music students, and DIY enthusiasts looking to maintain or upgrade their brass instruments. Specifications: Materials: Metal Color: As The Picture Shows Package Weight: approx.3g Size: approx.37.9x8.8mm/1.49x0.34in Package Includes: 3Pcs Trumpet Button Springs note: Please allow 1-3mm error due to manual measurement. Please make surer you not mind before your bid. Due to the differences between different monitors, the picture may not reflect the actual color to the item. Thanks!