• Plans: Reinforced Cobalt Legplates
• Item Level 75Disenchants into:
  Not disenchantable
• Binds when picked up
• Requires Blacksmithing (375)
• Use: Teaches you how to make Reinforced Cobalt Legplates.
• [Reinforced Cobalt Legplates]
• Requires Cobalt Bar (8), Crystallized Water(2)
• 1 Charges
• Sell Price: 6

Source

This item drops from Gundrak Savages in Zul'Drak.

Patch changes

• Patch 3.0.8 (2009-01-20): This pattern originally required only 4 cobalt bars and no crystallized water. 
  

External links

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