For Wilson Euphonium Black Bottom Cap Brass Large Long For 4th Piston Uses brass and other materials, with the hardness and acoustics adjusted by hammering and heat treatment on the outer circumference. ・BRASS Large Long By thinning the outer circumference of the brass and increasing its width, the resonance and high-quality sound are effectively enhanced without increasing unnecessary resistance to blowing. Used for about 3 months Retail price: ¥19,800 Please understand that this is a used item and consider purchasing it.