Valve Springs, Conn, 20K & 22K Sousaphone, Set of 3

Conn 20K & 22K OEM Sousaphone, 3 Spring Set.   Conn P/N SU30117, D19mm x L63mm.  Not for King tuba sousaphones, see my item ID# 16184 (3 valve) or 16967 (4 valve)