From the manufacturer's official website:

Hollowtech II Bottom Bracket

Features:

• HOLLOWTECH 2: Optimum balance of lightweight and rigidity.
• Outboard bearings provide additional stability
• Minimal bearing interface for smoother rolling
• Q-factor remains same as FC-6500/BB-6500.

Specifications:

• Pipe Billet Spindle/ OctaLink Mounting HOLLOWTECH II integrated BB
• Chainline Stabilizer Yes
• Chainline 43.5/45mm
• BB Shell Width 68/70mm
• Spindle Length HOLLOWTECH II
• Spindle Matelial Aluminum
• Adapter Aluminum

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