The RT-48 is a mouthpiece that is based on the classic Helleberg design with a larger inner diameter. The deep funnel shaped cup produces a dark tone with a broad core. The enhanced rim shape helps to provide a quick response and clarity of tone. This is a fantastic mouthpiece for medium-large and large-bore BBb and CC tubas.
Cup: Inner Diameter 33.5mm/1.3in, deep pear shaped cup
Rim: Width: 8mm/0.3in, flat with sharp inner edge