Balsa Wood Lumber

Balsa Wood Lumber is lumber.

Source
Balsa Wood Lumber can be obtained from company airship and company submersible exploratory voyages.

Uses
Balsa Wood Lumber is used in unlocking the following schematics in the company workshop:


 * Airship Prototype IV
 * Airship Prototype VI
 * Airship Prototype VII
 * Submersible Prototype V