TUBA MOUTHPIECE 66D4

Yamaha Model 66D4. Excellent matching with E flat brass band instruments. Very deep cup. Dark tone with plenty of volume. Symphonic sound. Similar to a Bach 24AW. Inner Diameter = 31.49mm. Contour = semi-flat. Thickness = semi-thick. Cut Depth = semi-deep. Throat = 8.87mm. Backbone = semi-wide.