Vandoren Bb-Clarinet 5JB Profile 88

I measure all mouthpieces and the 5JB curve varies by about .06mm over the 15 I have measured, mainly from the middle to the tip. You never really know what you are going to get! So a tip could be 1.50mm to 1.56mm.
Quality control is not good enough as a variation of just .01mm makes a big difference to performance.
Alan Cresswell. UK.

I use this mouthpiece on a yamaha ycl 450 clarinet. It's the second one I have owned, the other being for a buffet b12 clarinet. I preferred this piece over the vandoren b45 as the long facing suits my way of playing. Very expressive piece and compliments the rich tone of my yamaha beautifully. No qualms with the quality either, as with every vandoren mouthpiece I've had it is excellent. I use a rovner dark ligature and vandoren classic no2 reeds with it. Nice beak!

Just to be clear this mouthpiece is WAY too open for classical music.Difference betwwen this and my old b45 is huge. I use it for Balkan folk music and it's perfect for that. I can imagine it's also perfect for Klezmer and oriental music... Vandoren v12 reeds 2.5 suit this mouthpiece very well.

Great if you want the pitch flexibility of 7JB without sax like volumes... Plays perfectly in tune (if desired) with Vandoren Classic Blue 1.0s