• Shoulderpads of the Intruder
• Item Level 239Disenchants into:
  [Abyss Crystal]: 1-2
• Binds when picked up
  
• Leather
• Shoulder
• 457 Armor
• +87 Agility
  +96 Stamina
• Blue Socket
  Red Socket
• Socket Bonus: +6 Agility
• Durability 70 / 70
• Requires Level 80
• Equip: Improves hit rating by 55.
  Equip: Increases your attack power by 122.
  Equip: Increases your expertise rating by 47.
• 
• Sell Price: 8 84 55

Source

This item drops from Assembly of Iron on hard mode in the 25-man version of Ulduar.

Patch changes

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

External links

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