. Adjustable voltage allows you to fine-tune the attenuation. High stretch cotton material will not hurt your neck or fingerboard. Perform and record clean lines without unwanted string noise. Easy to use, no tools or special installation required. Fits guitars, basses and other stringed instruments. 18cm long for a regular 6 string guitar (electric/wooden/classic universal). Specifications: Material: Cotton Color: Black, Red, Blue, Yellow, Green, Pink (as shown) Length: 18cm / 7.1in Package Size: 10 * 10 * 2cm / 3.9 * 3.9 * 0.8in Package Weight: Approx. 20g / 0.7ozPackage Included: 1 * Mute StringsNote: The guitar shown in the picture is not included. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Due to manual measurements, there may be an error of 1-2mm.