Read from the World of Warcraft client build files.
How Shadow Stalker Shoulders Compares
Who It Suits
Leather is the armor type Demon Hunter, Druid, Monk and Rogue wear. With Agility or Intellect, Shadow Stalker Shoulders suits Assassination, Outlaw and Subtlety Rogue; Brewmaster, Mistweaver and Windwalker Monk; Balance, Feral, Guardian and Restoration Druid; Havoc, Vengeance and Devourer Demon Hunter.
Transmog Sets
Shadow Stalker Shoulders is part of the transmog set Battlegear of the Dreadhide Stalker (Rogue, Monk, Druid and Demon Hunter only). The other 16 pieces:
Blizzard numbers items as they are created, so the named items next to ID 136744 (136739 to 136750) were usually added in the same batch as Shadow Stalker Shoulders: the same quest line, zone, vendor or reward set.