Wah Wah Tube in B, Black (Item Code: WWTBA) This black wah wah tube produces the pitch of B in a clear tone with incredible sustain. The tone may be modulated by 'thumbing' the sound hole. A great "ambient" percussion sound to surprise and complement the other musicians in your group. Made of aluminum, approximately 13 inches in length and 2 inches in diameter. Includes a rubber mallet.