Combination (Right Hand and Left Hand) E(flat) Trill Key
This mechanism combines both the right hand and left hand E(flat) trill keys so that both spatula positions can operate the same tone hole.
Catalog Number: 10
Available On: 601, 660, 101, 201, I, II, III, & IV
Conflicts With: Offset High E Key (4); Offset High E & F Keys (17)