Iron Gauntlets

Hands, item level 20. Equip level 20, GLA MRD PLD WAR DRK GNB.

From 108 The Mountain That Strides and 3 more quests.

From quests

108 The Mountain That StridesChoose one of 5
107 Sylph SaysChoose one of 4
106 Hallo HalataliChoose one of 4
110 The Face of ThalChoose one of 5

Other databases

Eorzea Database (the official one, on The Lodestone)
Console Games Wiki
Garland Tools (vendors, crafting, drops)