Rim and cup similar to Yamaha 67B4, Yamaha Roger Bobo F, Laskey28F
It has a more brilliant sound than the C38 model as the cup has a V shape. Ideal if you have problems with the high register.
Inner rim diameter: 32mm
Outer rim diameter: 48mm
Cup depth 38mm / Throat 7,75mm
Backbore Medium Symphony
Rim options: F semi flat - S rounded