Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Split-Vein Bracers Compares
Who It Suits
Cloth is the armor type Mage, Priest and Warlock wear. With Intellect, Split-Vein Bracers suits Discipline, Holy and Shadow Priest; Arcane, Fire and Frost Mage; Affliction, Demonology and Destruction Warlock.
Transmog Sets
Split-Vein Bracers is part of the transmog set Vesture of Borrowed Souls (Priest, Mage and Warlock only). The other 16 pieces:
Blizzard numbers items as they are created, so the named items next to ID 137434 (137429 to 137439) were usually added in the same batch as Split-Vein Bracers: the same quest line, zone, vendor or reward set.