"You just need Imagination to use this."
A block that has multiple purposes. Your imagination is the only limit to use it.
Accepts covers and upgrades, which are the main usage of it.
Outputs 32 EU/p at the dotted side.

Internal energy storage of 10k EU (can be upgraded)
Internal tank of 1000 mB
Internal item buffer of an item.

Block usage tip:
You can use a line of machine boxes as an energy/item/liquid transporter by using valve covers with the dotted side.
You can upgrade the energy storage and voltage to use it as an energy storage block.
You can use a drain cover on an infinite water source to collect infinite water and pump cover to output that water.

Recipe:
1 Aluminium Machine Hull/Iron Machine Hull/Basic Machine Casing
1 Random Machine Parts

3200EU in an Assembly Machine for 80 seconds.