In Wrath of the Lich King it is item level 245, requires level 80 and is named Aegis Handguards. In MoP Classic it is item level 232, requires level 80 and sells to vendors for 1c.
Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Conqueror's Aegis Handguards Compares
Who It Suits
Plate is the armor type Death Knight, Paladin and Warrior wear. With Strength or Intellect, Conqueror's Aegis Handguards suits Arms, Fury and Protection Warrior; Holy, Protection and Retribution Paladin; Blood, Frost and Unholy Death Knight.
Transmog Sets
Conqueror's Aegis Handguards is part of the transmog set Conqueror's Aegis Plate (Paladin only). The other 16 pieces:
Built from the World of Warcraft client build files and recorded Auction House snapshots.
Where Conqueror's Aegis Handguards Fits
Other Items Named Conqueror's Aegis Handguards
1 other item in the current build is also called Conqueror's Aegis Handguards. Same-name entries are usually a different rank, faction, quest stage or reward track of the same object.
Items Numbered Next to Conqueror's Aegis Handguards
Blizzard numbers items as they are created, so the named items next to ID 46174 (46169 to 46179) were usually added in the same batch as Conqueror's Aegis Handguards: the same quest line, zone, vendor or reward set.