Read from the World of Warcraft client build files.
How Ohn'ahran Falconer's Chainmail Compares
Who It Suits
Mail is the armor type Evoker, Hunter and Shaman wear. With Agility or Intellect, Ohn'ahran Falconer's Chainmail suits Beast Mastery, Marksmanship and Survival Hunter; Elemental, Enhancement and Restoration Shaman; Devastation, Preservation and Augmentation Evoker.
Transmog Sets
Ohn'ahran Falconer's Chainmail is part of the transmog set Ohn'ahran Falconer's Regalia (Hunter, Shaman and Evoker only). The other 10 pieces:
Items Numbered Next to Ohn'ahran Falconer's Chainmail
Blizzard numbers items as they are created, so the named items next to ID 191997 (191992 to 192002) were usually added in the same batch as Ohn'ahran Falconer's Chainmail: the same quest line, zone, vendor or reward set.