New and high quality It is used to mute off the outside strings One piece of strip can be used to tune two octaves at a time Introductions: Piano tuning is a process of tuning each tone and string. However, because one tone is always composed of two or three strings, we should mute one string when we're tuning another one. At this moment, mute strip for piano chromatic tuning will be needed. Made of felt, this mute strip for piano chromatic tuning is so that it 't bring any damage to piano strings. what should be in mind is to step on the damper pedal when you wind this mute strip around strings so that the damage caused by string displacement can be avoided. Specifications: Material: felt Taper strip width from 0.63" to 1.02" Length: 44.09" Thickness: 0.197" Color: red Weight:29g Package Contents: 1 x Piano Tuning Felt Temperament Strip Tapered Mute 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.