These spring support plates are designed for trumpet. These valve spring washers are a great replacement for old, worn, damaged, or lost springs plates, providing better performance and sound quality. A great replacement for trumpet spring repair. Small size, light weight, easy to carry around, suitable for upper and lower horns. This is a good instrument accessory for both professionals and students. Features -Color:White -Material:Plastic -Size:2.70X1.80X0.30cm/1.06X0.71X0.12in -Crafted from safe materials, this accessory boasts exceptional durability and longevity, ensuring it can withstand frequent use and last for years to come. -Designed to enhance the performance and sound quality of bass horns, this spring support plate is a must-have for musicians. -With its easy installation process, this accessory can be added to your instrument without any hassle, and it won't interfere with its original functionality. -Whether you're playing a bass horn, this spring support plate is suitable for both, making it a versatile addition to any musician. -Suitable for professional musicians, as these spring support plates can significantly improve the overall sound and performance of instrument. Package list: 3 x Trumpets Washers