Jet-Tone mouthpieces were legendary throughout the '60s and '70s as commercial trumpet players sought to expand their range. The Jet-Tone brand was in danger of disappearing altogether but was recently revitalized and reintroduced with strict conformity to the original specifications. This includes the Jet-Tone JT MF, which is the original model favored by the greatest lead trumpeter who ever lived. The "V" cup offers more resistance and is good for strong high-note players or high school jazz band players seeking to expand their upper register.