Enchanted Thorium Helm

The Enchanted Thorium Helm is a great helm for tanking due to the bonuses to Defense and Stamina. It is made by high-level Blacksmiths.

Source
This item is crafted by Blacksmiths with a skill level of 300 who also have the Armorsmith specialty.

The components are:
 * 6 Arcanite Bars
 * 16 Enchanted Thorium Bars
 * 6 Essences of Earth
 * 2 Large Opals
 * 1 Azerothian Diamonds

The plans are a reward when you turn in to Lorekeeper Lydros in Dire Maul. Urok Doomhowl in Blackrock Spire drops the top half of the volume and the Black Guard Swordsmith in Stratholme drops the bottom half.