In Wrath of the Lich King it is item level 226, requires level 80 and sells to vendors for 7g 29s 40c. In MoP Classic it is item level 213, requires level 80 and sells to vendors for 7g 29s 40c.
Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Swarm Bindings Compares
Who It Suits
Leather is the armor type Demon Hunter, Druid, Monk and Rogue wear. With Agility or Intellect, Swarm Bindings suits Assassination, Outlaw and Subtlety Rogue; Brewmaster, Mistweaver and Windwalker Monk; Balance, Feral, Guardian and Restoration Druid; Havoc, Vengeance and Devourer Demon Hunter.
Blizzard numbers items as they are created, so the named items next to ID 39722 (39717 to 39727) were usually added in the same batch as Swarm Bindings: the same quest line, zone, vendor or reward set.