??? wood
From PSU Cyril Wiki
A slot, found on ranged weapon boards, for some type of wood. Using woods of the wrong quality and/or from the wrong planet changes the final product to that of a lower grade and/or reduces the success rate by a significant percentage without any benefit.
All 6★+ ranged weapon boards also accept Kubara Wood. This reduces the success rate by a significant percentage and changes the final product to a Kubara weapon with the same rarity.
Known examples: