In Wrath of the Lich King it is item level 245 and requires level 80. In MoP Classic it is item level 225, requires level 80 and sells to vendors for 1c.
Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Valorous Siegebreaker Gauntlets Compares
Who It Suits
Plate is the armor type Death Knight, Paladin and Warrior wear. With Strength or Intellect, Valorous Siegebreaker Gauntlets suits Arms, Fury and Protection Warrior; Holy, Protection and Retribution Paladin; Blood, Frost and Unholy Death Knight.
Transmog Sets
Valorous Siegebreaker Gauntlets is part of the transmog set Valorous Siegebreaker Battlegear (Warrior only). The other 16 pieces:
Items Numbered Next to Valorous Siegebreaker Gauntlets
Blizzard numbers items as they are created, so the named items next to ID 45430 (45425 to 45435) were usually added in the same batch as Valorous Siegebreaker Gauntlets: the same quest line, zone, vendor or reward set.