The PT-6010-00 is a BLACK TUSQ XL nut for GIBSON electric guitar style with slots (string grooves). TUSQ XL minimizes tuning instability by releasing Teflon micro-molecules through string vibration, which minimizes string friction. It provides a crystal-clear tone, resulting in improved sustain. Specifications: ■ Guitar Nut ■ BLACK TUSQ XL ■ GIBSON Electric Guitar Style ■ With Slots (String Grooves) ■ Size: ・Width: Approx. 4.71mm ・Length: Approx. 43.53mm ・Height: Approx. 9.37mm ■ E to E: Approx. 35.87mm ~From the manufacturer's website~ The Black TUSQ XL series has a black material that blends seamlessly with the instrument's design. The TUSQ XL series can maintain correct tuning for a longer period than any nut made of synthetic resins such as graphite or plastic. Furthermore, it provides a crystal-clear tone, resulting in improved sustain. The fact that TUSQ XL is used by guitar manufacturers around the world is proof of its reliability. TUSQ XL releases Teflon micro-molecules through string vibration. TUSQ XL, covered by these molecules, minimizes string friction, reducing tuning instability. And because these Teflon molecules are released from the nut, they are not lost and always maintain their lubricating effect. ※1 When installing, processing according to the condition of the instrument is required. ※2 It can be easily processed with sandpaper, etc., but it is basically recommended to have a professional guitar technician install it.