In Wrath of the Lich King it is item level 245, requires level 80 and is named Siegebreaker Shoulderplates. In MoP Classic it is item level 232, requires level 80 and sells to vendors for 1c.
In the Appearances collection, Conqueror's Siegebreaker Shoulderplates is listed as Vendor. Appearance ID: 11662. 2 other items wear the same appearance:
Read from the World of Warcraft client build files.
How Conqueror's Siegebreaker Shoulderplates Compares
Who It Suits
Plate is the armor type Death Knight, Paladin and Warrior wear. With Strength or Intellect, Conqueror's Siegebreaker Shoulderplates suits Arms, Fury and Protection Warrior; Holy, Protection and Retribution Paladin; Blood, Frost and Unholy Death Knight.
Transmog Sets
Conqueror's Siegebreaker Shoulderplates is part of the transmog set Conqueror's Siegebreaker Battlegear (Warrior only). The other 16 pieces:
Items Numbered Next to Conqueror's Siegebreaker Shoulderplates
Blizzard numbers items as they are created, so the named items next to ID 46149 (46144 to 46154) were usually added in the same batch as Conqueror's Siegebreaker Shoulderplates: the same quest line, zone, vendor or reward set.