Hans Moennig developed this reverse cone tapered barrel, manufactured by Buffet Crampon. Reverse cone barrels are larger at the mouthpiece end, and Moennig barrels are .589"-.590" at the mouthpiece end and reduce to .579" at the opposite end. The rather severe reduction in the barrel bore has several positive affects. The throat tone twelfths, particularly thumb F/C and E/B, are reduced in size, aiding in overall tuning. The choke created by the step at the juncture of mouthpiece and barrel can add a nice resistance that increases response and adds center to the tone.