Yamaha euphonium genuine water key spring screw and cork kit for older 1976-1986 YEP-211 type euphonium tuning slides with 10x3mm cork. Contact me if you have questions on your model's fit or need parts for another horn. See my item ID# 16895 for a current YEP-211 (1986-) tuning slide spring, screw cork kit. See my item ID# 16739 (16745 Si) for a complete kit with water key.
