Cup Diameter: 32.00 mm, Long tapered, funnel shaped
Rim: 7.50 mm, Moderately round rim
Bore: 8.60 mm
Resistance: Moderate
Shank: Large

Model 83 offers comfortable resistance and ease of tone production. The narrow rim provides quick response, the cup provides substantial volume enhanced by a rather large throat bore with a backbore matched for resonance and efficiency. An ideal mouthpiece for CC and BBb tubas, works particularly well on medium-bore instruments and is ideal not only for young players but for also for those who use large instruments.