Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Storm Chaser's Waistguard Compares
Who It Suits
Mail is the armor type Evoker, Hunter and Shaman wear. With Agility or Intellect, Storm Chaser's Waistguard suits Beast Mastery, Marksmanship and Survival Hunter; Elemental, Enhancement and Restoration Shaman; Devastation, Preservation and Augmentation Evoker.
Transmog Sets
Storm Chaser's Waistguard is part of the transmog set Stormwing Harrier's Camouflage (Hunter only). The other 16 pieces:
Blizzard numbers items as they are created, so the named items next to ID 200733 (200734 to 200738) were usually added in the same batch as Storm Chaser's Waistguard: the same quest line, zone, vendor or reward set.