• Gloves of the Endless Dark
• Item Level 226Disenchants into:
  [Abyss Crystal]: 1-2
• Binds when picked up
  
• Leather
• Hands
• 369 Armor
• +85 Agility
  +50 Stamina
• Red Socket
  Yellow Socket
• Socket Bonus: +6 Agility
• Durability 40 / 40
• Requires Level 80
• Equip: Improves hit rating by 65.
  Equip: Improves haste rating by 48.
  Equip: Increases attack power by 84.
• 
• Sell Price: 5 73 25

Source

This item can be found inside Gift of the Observer after defeating Algalon the Observer in the 10-man version of Ulduar.

Patch changes

• Patch 3.1.0 (14-Apr-2009): Added. 
  

External links

• Battle.net (EU)
• Wowhead
• Thottbot
• WoWDB