GruvGear
只需放在琴頸上弦線下面的空隙，便可消除多餘的雜訊/音頻。
特別適用於High-Gain 設定
一包有兩件
 
Just slips under the strings right behind the nut to silence overtones and ringing noise. Perfect for high-gain settings
One Package contain 2 pieces