[Soft Material]-- Made of soft material, without damage to your guitar strings. [Weaken String Noise]-- Help eliminate overtones and resonances, reduce unnecessary string noise of string instruments, which creates an excellent playing environment for your recording or live performance. And you can practice the guitar better while not disturbing other people. [Tow Size Strap]-- It contains S and L size, small strap can be used with 6-string electric/wood guitar, classical guitar, four-string bass. Large strap is suitable for 7-10-string electric guitar, 5-10 -string electric bass. [Widely Used]-- Suitable for guitars, basses and other stringed instruments. A great assistant tool for guitar/ bass players. [Easy To Use]-- Easy to install and remove, no tools or special installation required. You can adjust the strap to fine-tune your dampener pressure and slide it to the head of instrument quickly when not in use. colour:Black Material:Plastic+cloth size:185mm, 215mm Package Contents: 2 x Guitar Muting Strap(Two Size) Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.