· This string instrument mute allows you to achieve a weak sound effect just by pinching the string· Internal sponge reduces string vibration Tightening is done with screws, so you can adjust the tension of the mute· Not only can it be used for acoustic and classic guitars, but also for string instruments other than guitars, such as ukuleles and bass· Ultra lightweight design weighs only 0.4 oz (10 g). The size is not bulky so you can put it in your gig bag pocket or something else when not in use· The design, color, and specifications may change without prior notice due to changes in design on the manufacturer side