Yamaha YEP-321, YEP-621 YEP-642 (and many others) Tuning Slide Water Key Set, Water key, spring, screw, & cork. Nickel (P/N G1190001) or silver-plate (G1390001), you choose. Contact me if you wish to confirm your model's fit or need parts for another horn. Fits many other horns (but not all!).
