Features: 【Increased Volume】The string retainers in this set are designed to increase the force of the strings against the pillow, resulting in improved volume. 【Efficient String Retention】These string retainers effectively retain the strings and reduce string friction, allowing for more accurate playing and saving on string replacement. 【Extended String Life】By wear and tear on the strings, these string retainers contribute to longer string life and reduce the frequency of string replacements. 【 Construction】Made of high-quality composite material, these string retainers are and built to last. 【Versatile Compatibility】Suitable for classical guitar, flamenco guitar, and ukulele, making them versatile accessories for various stringed instruments. Specifications: Part Name: String Retainer Material: Composite material Size: Hole Diameter - 1.2mm/0.05inch Color:White,Black,Brown Package Content: 12x String Retainer Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.