Cannot be traded. You can refine your armor to +6 through Prontera's Refining Expert. -1 time limited-
[iRO Description] Take this certificate, 1 Elunium and an upgradable Headgear to Mighty Hammer in Eden Group or Payon. If he fails on the upgrade when the item is +4, +5, or +6 the item will not break and it will stay at its current upgrade level. This item is Tradable, and Storagable only.