Fits many Bach trombones. Contains a Bach water key spring, Conn P/N 46098 , rubber pad (3x8mm), Conn P/N B2752, & screw, Conn P/N C2397. See my item ID# 28243 for a complete kit including nickel water key. See my item ID# 28215 for just the spring & seal. Contact me if you wish to verify your model's fit.
