OEM Yamaha tuba, specifically for YBB-641(2), YBB-645, YBB-841 & YCB-861, Water Key Set P/N H2190002, nickel finish. Contains water key, spring, screw, & cork. Spring P/N H2141312, Screw P/N H2141301, & Cork P/N H2141320. Contact me if you wish to verify your model's fit or you need other parts.
