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.

Features:

• 10-speed
• Alloy sprocket carrier
• Combinations : Standard Model
  • 11-12-13-14-15-16-17-19-21-23T
  • 12-13-14-15-16-17-19-21-23-25T
  • 12-13-14-15-16-17-19-21-24-27T
  • 11-12-13-14-15-17-19-21-23-25T

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