Who It Suits
Mail is the armor type Evoker, Hunter and Shaman wear. With Agility or Intellect, Highmountain Riverscale Clasp suits Beast Mastery, Marksmanship and Survival Hunter; Elemental, Enhancement and Restoration Shaman; Devastation, Preservation and Augmentation Evoker.
Similar Items
The 10 items nearest to Highmountain Riverscale Clasp (item level 13) in item level among Armor > Mail, Waist slot, from item level 8 to 19.
Phalanx Girdle has the highest item level here (19).
Next item levels up from Highmountain Riverscale Clasp among Armor > Mail, Waist slot: Brigade Girdle (item level 23), Bonelink Belt (item level 23), Khan's Belt (item level 24), Gryphon Mail Belt (item level 25) and Formidable Belt (item level 25).
Transmog Sets
Highmountain Riverscale Clasp is part of the transmog set Highmountain Riverscales (Hunter, Shaman and Evoker only). The other 16 pieces:
Built from the World of Warcraft client build files and recorded Auction House snapshots.