From the manufacturer's official website:

Features:

• Super Narrow for 10-speed
• 10-speed compatible only
• New chain connecting tool(TL-CN23/CN32) is required for CN-7801
• Weight: 280g

Specifications:

• Type Super Narrow HG
• Pin Link Plate zinc-alloy plated
• Roller Link Plate zinc-alloy plated
• Chromizing Treatment Link Pin Yes
• Average Weight 280g (116 links)

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