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You are describing the Sellmansberger 1, aka Blokepiece. Narrow, flat rim like a Helleberg, wide diameter, bowl-shaped cup. Great low register on my B&S, color throughout, and only a little more work than the MF-4 in the upper register. Intonation the same as the MF-4.

The MF-4 is a smaller mouthpiece with a wider, rounder rim, but it is also an excellent choice for F tuba.

Rick "thinking the Blokepiece requires a little more from the player in the upper register and a little less in the lower register, compared to the MF-4" Denney

Mike Finn has his specs on his website. I believe Houser now posts the "blokepiece" and its specs on its website as well.

pauvog1 wrote:Thanks, where can I find some spec's on these mp's. Especially the blokepiece.

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