• Unbreakable Chestguard
• Item Level 226Disenchants into:
  [Abyss Crystal]: 1-2
• Binds when picked up
  
• Plate
• Chest
• 2348 Armor
• +105 Strength
  +159 Stamina
• Red Socket
  Yellow Socket
• Socket Bonus: +9 Stamina
• Durability 165 / 165
• Requires Level 80
• Equip: Increases defense rating by 60.
  Equip: Increases your shield block rating by 51.
  Equip: Increases the block value of your shield by 77.
• 
• Sell Price: 15 2 15

Source

This item drops from Auriaya 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