Fits many Bach trombones. Contains a nickel Bach water key Conn P/N 42063, spring Conn P/N 46098 , rubber pad (3x8mm) Conn P/N B2752, & screw Conn P/N C2397. See my item ID# 16552 for just the screw, spring & seal kit. See my item ID# 28215 for just a spring & seal. Not for Bach TB200 & TB300 trombones. Conn trombones are also a different kit. Contact me if you would like to verify your models fit.
