Here are UMI mouthpieces unique to the Conn, King, Benge, and other post-Elkhart Conn lineups that are not available from any other brand.
Cornet:
- 7BR British-style short shank mouthpiece - Conn, King, Benge
Trumpet/cornet:
- 4SC shallow-cup "lead" mouthpiece - Conn, Benge, UMI
- 5½SC shallow cup "lead" mouthpiece - Conn, Benge, UMI