Excellent material The string ferrule is made of excellent material, which can withstand the long-term use. Simple structure The string ferrule is simple in structure, which brings you quick and easy installation. Smooth surface The string ferrule enjoys fine and precise polishing, which ensures the smooth surface. Compact structure The string ferrule is designed with a compact structure, easy to use and store. Professional use The string ferrule is designed to fix the string and make sound more beautiful. Specification: Color: As shown in picture Material: Copper Size: Approx. 0.9x0.9x0.92cm/0.35x0.35x0.36inch Note: There might be a few color distortions due to different resolutions. There might be a slight error due to different hand measurements. Package Includes: 6 Pieces String Ferrules