Bellows are Platesmithing Profession Assets that can be acquired as necessary components for completion of a number of rare Platesmithing tasks (levels 14-20) and/or as optional components in Rare tasks that will improve the chances of producing a higher tiered armor piece.
[Worn Bellows] may be purchased for 1 from M'tari Prin'tal in Protector's Enclave (North corner of the Seven Suns Coster Market). Bellows of higher tiers may be acquired from [Professions Booster Pack] and asset packs purchased in the Zen store. Bellows are not bound and may be traded on the Tarmalune Auction House or transferred between players.
A task requiring Bellows as an asset will take any tier of Bellows in its slot. Higher tiered Bellows serve only to improve chances of producing higher tiered results.
At Profession Level 3, 4x [Iron Bellows] can be upgraded to produce [Steel Bellows].
At Profession Level 4, 4x [Steel Bellows] can be upgraded to produce [Mithral Bellows].
There is no task that will allow [Worn Bellows] to become [Iron Bellows].