Sealable Copper Wire
These features only exist in outdated versions of Galacticraft.
The Sealable Copper Wire should act just like normal copper wire but it is bigger and can be sealed with the Oxygen Sealer. At the time of this writing the block is not functional but can be crafted, the version is 1.6.2-a0.1.38.525.
Note: this block was replaced with Sealable Aluminum Wire.