Campagnolo FH-BUU015X1 - one-piece freewheel body for HG (Shimano) 9/10/11-speed.
Suitable e.g. for Bora One CX, Bora Ultra 80, Bora Ultra Two, Bora One, Bullet Ultra CX, Bullet Ultra H50, Bullet Ultra H80, Bullet Ultra H105, Eurus, Hyperon Ultra Two,...