J4 cup: Jazz model / variety of music / popular and dance music / Latin Music
If you have no problems in the high register, this cup will help you to have a good medium register.
Inner rim diameter: 15,75mm / Outer rim diameter: 27,40mm
B / sharp inner rim. Similar to the classic American but more comfortable
L / rounded inner rim shape Rim shape, Comfort in high registers
Cup depth 8.50mm / Throat 3.60mm nº28 / Backbore P close jazz