Conn 20K & 22K OEM Sousaphone, 3 Spring Set. Conn-Selmer SU30117, D19mm x L63mm. Not for King tuba sousaphones, see my item ID# 16184 (3 valve) or 16967 (4 valve). Customer verified fits a Weril J740 from Brazil. For additional springs, see my valve spring reference chart.
