Dillon Roylance TDB Tuba Mouthpiece

For Roylance TDBO model: Rim Diameter- 1.260" (32mm) Throat Size- .285" (7.3mm) Cup Size- Medium Shallow Bowl For Roylance TDBS model: Rim Diameter- 1.260" (32mm) Throat Size- .315" (8mm) Cup Size- Medium Bowl