The FLS cup is an excellent choice for someone looking for an easier upper register and more focused sound in a flugelhorn mouthpiece, while retaining a characteristic flugel sound.
- Inner Diameter: .620 measured .04 inches into the cup.
- Outer Diameter: 1.094
- Throat: 19
- Backbore: This top is played with either a Bach, French, Standard (Yamaha), or Trumpet shank which can be purchased here.