From the manufacturer's official website:

The innovation of carbon fiber in a powerful design. The most adavanced technology of carbon fiber tempered by tough experience with the great cycling champions. Full carbon fiber road stem, stress directional fiber orientation. Titanium 6/4 hardware, patented threaded insert.

Technical Data:

• Handlebar O.D.: 31,7 mm (Newton standard)
• Fork steerer O.D.: 28,6 mm (1 1/8")
• Extension angle: 82°
• Tightening torque: for all bolts, 8 Nm (5,9 ft.-lbs)(71in-lb)
• Weigth (120 mm size): 119 grams

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