All Brass "Heavy Series" mouthpiece for Flugelhorn

Mouthpiece for Flugelhorn heavy model. Weight 98 Grs
Made of turned bronze with a thick silver plating.
Conical chamber
Dimensions:
1FL Cup diameter 17.04 mm. Depth 14.67 mm.
3FL Cup diameter 16.49 mm. Depth 13.76 mm.
5FL - Cup diameter 16.66mm. Depth 14.20