Campagnolo Bora Ultra crankset.
170 mm crank arm, 53/39T, 11 speed.
High quality ultra light carbon, titanium axle and titanium screws with left-handed thread. Exclusive design of the eight up-shift zones and two down-shift zones of the chainring. The specific profile of the teeth and the zones dedicated to upward and downward chain movement enables fast and precise shifting in all conditions.
Used, in great condition. Has some scratches, see pics.