In Wrath of the Lich King it is item level 245, requires level 80 and is named Nightsong Spaulders. 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.
How Conqueror's Nightsong Spaulders Compares
Who It Suits
Leather is the armor type Demon Hunter, Druid, Monk and Rogue wear. With Agility or Intellect, Conqueror's Nightsong Spaulders suits Assassination, Outlaw and Subtlety Rogue; Brewmaster, Mistweaver and Windwalker Monk; Balance, Feral, Guardian and Restoration Druid; Havoc, Vengeance and Devourer Demon Hunter.
Similar Items
The 10 items nearest to Conqueror's Nightsong Spaulders (item level 35) in item level among Armor > Leather, Shoulder slot, from item level 32 to 39.
Items Numbered Next to Conqueror's Nightsong Spaulders
Blizzard numbers items as they are created, so the named items next to ID 46187 (46182 to 46192) were usually added in the same batch as Conqueror's Nightsong Spaulders: the same quest line, zone, vendor or reward set.