Skybuilders' Steel Plate

Skybuilders' Steel Plate is miscellany used in the Ishgardian Restoration.

Source
Skybuilders' Steel Plates can be crafted by armorers as a level 20 recipe with the following materials:
 * x6
 * x1
 * x4
 * x2

Uses
Skybuilders' Steel Plates are exchanged for in custom deliveries to Potkin in The Firmament.