Keep your brass instrument performing with this essential water key spit valve spring. This precision replacement component is designed for various brass instruments including trumpets, trombones, tenor horns, and alto horns. The spring ensures smooth operation of your water key mechanism, allowing for proper drainage and maintenance of your instrument. This replacement part helps maintain consistent tension for reliable valve function, making it an indispensable repair component for musicians and instrument technicians. Whether you're a professional musician or a new player, having a properly functioning water key is crucial for instrument care and performance. This spring is specifically engineered to meet the exact specifications required for brass instruments, ensuring a perfect fit and reliable operation.