Keilwerth (ESM )Jazz mouthpiece

[highbrass]

Keilwerth (ESM )Jazz mouthpiece(7*)- bad,good mouthpieces?

[MM]

If this is the "aftermarket" Keilweth mpc, the hard rubber "jazz" mouthpiece, not the plastic stock mpc with the concentric rings on the shank, it is a very good mpc. They were just becoming popular, so Keilwerth discontinued them!