Features: Perform and record clean lines without unwanted string noise. Easy to use, no tools or special installation required. Professional accessory for guitars, basses, and other stringed instruments. Fastener Design -- easily adjust the force required by the muffled sound, when idle, can be conveniently pushed to the guitar head. Suitable for live performance and recording studio, saving both time and labour. Specifications: Color: Black/ Blue/ Green/ Orange/ Python Pattern/ Leopard Pattern/ Zebra Pattern (optional) Suit For: 6 Strings Acoustic Guitar and Electric Guitar and Classic Guitar Length: 18cm / 7.1in Width: 2.5cm / 0.98in (max.); 1.8cm / 0.71in (min.) Package Size: 15 * 11 * 2cm / 5.9 * 4.33 * 0.79in Package Weight: 11g / 0.39oz Package List: 1 * Strings Muter