From the manufacturer's official website:

Hollowtech II Bottom Bracket

Features:

• Super power transmission
• Optimum balance of lightweight and rigidity
• Q-factor remains same as FC-7701/BB-7700
• Minimal bearing interface for smoother rolling

Specifications:

• Model No. SM-FC7800
• Pipe Billet Spindle/ OctaLink Mounting HOLLOWTECH II integrated BB
• Chainline 43.5mm
• BB shell Width 68/70mm
• Spindle Length HOLLOWTECH II
• Spindle Matelrial chrome-moly steel
• Adapter aluminum

For more information, please visit this product's webpage.