The rubber material has strong toughness and can be bent at will. The rubber material has strong anti-skid ability and easy to fix the position. Insert the fork into the string to pin the string to obtain the effect of silence. Use in the middle and low range. Features - Color: Orange. - Material: Rubber. - Size: About 11.50X1.20X1.00cm/4.52X0.47X0.39inch. - Made of material, the texture is and moderate, and does not hurt the strings. - A perfect tuning accessory for piano with perfect working performance. - When used, insert between the gaps that need strings to prevent the other strings from sounding during the tuning. - Including two rubber wedge mutes, perfect to meet the tuning needs of the . - This practical product is suitable for both piano beginners and piano teachers. Package list: 2 x piano tuning wedges