Features: Made from Cowbone material, it have excellent sound transmission and wear resistance, which can enhances sound quality and durability of bass performances. The design conforms to ergonomics, providing a comfortable playing experience for bassists, reducing wrist pressure, and increasing the comfort of long-term performances. After precise production, it ensures a close fit with the bass neck, stable fixation in the correct position, and will not interfere with performances. Easy to install, suitable for most 4-string basses, providing stable support and comfort, enhancing the performer's skill and sound quality performances. Suitable for bassists, including beginners, amateurs, and professional performers, who hope to improve sound quality and comfort of their performances. Specifications: Material: Cowbone Size: Approx. 4.2x0.3x0.42cm/1.65x0.12x0.16inch Package Includes: 1x Bone Nut note: Please allow 1-2cm errors due to manual measurement, make sure that you not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.