Shimano Ultegra SL Gray 10 speed Crankset is excluding Bottom Bracket Cup Unit. You have to order it separately.
Crankset with Integrated Bottom Bracket (SM-FC6601)
HOLLOWTECH ll Crankset
FC-6601G : 45g lighter than current model (FC-6600)
2 tone color chainrings

Specifications
Rear Speeds 10
PCD(mm) 130mm
Splined Crank Yes
Chain Super Narrow HG for 10-speed
Chain Line 43.5mm
Hollowtech II technology Yes

Available Cranklengths:
- 172,5mm / 39x53