The John Hagstrom Signature Series Trumpet Mouthpiece from Yamaha has a smaller rim that creates a more efficient balance between the performer and trumpet. Balanced with the features of a deeper cup and larger back bore, this Yamaha trumpet mouthpiece is an optimal choice for the needs of those with a heavy performance schedule. The YAC HAGSTROM is the standard mouthpiece on the YTR-9445CHS Orchestral C Trumpet, which Hagstrom also helped design.Quality brass mouthpieces contribute to the high regard Yamaha has earned among beginning and professional musicians alike. The result of a special approach to design and manufacture, Yamaha mouthpieces deliver the performance and comfort required where they are needed most: where instrument meets musician.The mouthpiece production technique used by Yamaha promises consistent quality mouthpieces, time after time. Other manufacturers use a specific cutting tool to create every mouthpiece, which causes problems as tools start to wear. This can result in inconsistent quality and poor performance. Yamaha's computer-aided design system and computer controlled lathe work together to produce precise, consistent mouthpieces.