From the manufacturer's official website:

Computer designed Hyperglide (HG) sprockets incorporate specifically positioned shift ramps and tooth profiles for improved chain control during shifting. Fast and responsive indexed shifting is the result. A superior surface treatment of CS-7800 has been applied to the titanium sporockets which increased durability by approximately 30%.

Features:

• Titanium, alloy carrier mounted large sprockets
• 9-speed freehub compatible
• Use with Super Narrow Chain for 10-speed
• Combinations:
  • 11-12-13-14-15-16-17-18-19-21T
  • 11-12-13-14-15-16-17-19-21-23T
  • 12-13-14-15-16-17-18-19-20-21T
  • 12-13-14-15-16-17-18-19-21-23T
  • 12-13-14-15-16-17-19-21-23-25T
  • 12-13-14-15-16-17-19-21-24-27T
• Weight: 173g (11-23T)

Specifications:

• Model No. CS-7800
• Speed 10-speed
• Finish nickel plated & Ti
• Average Weight 173g (11-23T)

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