Features: High-quality materials: The head screw cover and fastener are made from premium metal, offering durable strength and stability to withstand everyday wear and tear. Excellent fit: These replacement parts are designed for various brands and models of woodwind instruments, ensuring a precise fit and easy installation without compatibility concerns. Easy installation: The straightforward process allows even beginners to replace parts quickly, requiring no special tools or skills, saving time and effort. Improved mechanical function: Using new screw covers and fasteners can optimize the instrument's mechanical operations, ensuring better outcomes and clear sound quality with each use. Cost-effective solution: This set of replacement parts offers an affordable option for enthusiasts, extending the instrument's service life and maintaining its operational efficiency. Specifications: Dimension:1.84×1.09cm/0.72×0.43in Component:Copper-nickel plating Package Includes: 1pc Flutes head screw caps nut note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.