If you were redirected to this page, the item you clicked is a cover. Look for its recipe and info below.

Almost all GregTech blocks accept Covers. Covers are placed on the sides of machines, and depending on their function, enable or disable certain types of interactions. They also block that side of the machine, for purposes of rain safety.
Machines that accept Covers can only have one cover per face.
Most covers interact (or deny interaction with) with either the machines they are placed on, the block the cover is facing, or both.
Note: ALL covers, except the Computer Monitor, block right-click access to their side.
Covers that are intended for automation (pump/conveyor/drain...) access the machine's internal inventory and use a tiny amount of EU to function, drawn from the machine's internal energy storage. If the covered machine has been given MJ or Steam Upgrades, the covers can use this energy as well. Solar Panel covers supply energy (EU) to the machine's internal energy storage. Note: If a machine does not have an internal energy storage, energy is not consumed by these covers.

Covers can only be removed using a Crowbar. Railcraft Crowbars will also work.


When a machine is disassembled with a Wrench, its covers are kept. A Crowbar is required to remove Covers from a machine.

Screwdrivers

Screwdrivers modify covers, changing their behavior by cycling through their available functions. On covers such as the Conveyor Belt and the Pump Cover, these include Export, Import, Export (conditional), Import (conditional), Export (inver cond), Import (invert cond), Export allow Input, Import allow Output, Export allow Input (conditional), Import allow Output (conditional), Export allow Input (invert cond) and finally, Import allow Output (invert cond). "Conditional" refers to the Redstone signal or lack thereof that the machine is interpreting through a Redstone Machine Controller.

They can also be used to change the frequency of Wireless Redstone covers.

You can also get a free cover that blocks all interactions by right clicking an uncovered machine facing with a screwdriver. Right click again to get a red cover that only blocks Redstone.

Utility/Automation Covers :

Type	Effect	Recipe	Assembler
Conveyor Module	Input/Output items from covered inventory	2x Electronic Circuit/Basic Circuit (UE), 3x Iron/Aluminium Plate, 3x glass, 1x RE-Battery/Battery (UE)	No
Pump Module	Input/Output liquids from covered inventory (1000mB/t)	1x Pump, 1x Iron/Aluminium Plate	Yes
Item Transport Valve	Work as both Conveyor and Pump Modules	1x Conveyor Module, 1x Pump module	Yes
Shutter	Selectively blocks pipe interactions	1x Iron Door, 2x Iron/Aluminium Plate	Yes
Drain	Collects liquids in front of it or rain if placed on top	2x Iron bars, 2x Iron/Aluminium Plate	Yes
Solar Panel	Produces 1 EU/t during the day for the covered inventory (must be on top)	2x Silicon Plate, 2x Electronic Circuit/Basic Circuit (UE), 1x Carbon Plate, 1x Glass Pane	No
Crafting Module	Rightclick the covered face to access a workbench	1x Crafting table, 1x Iron/Aluminium Plate	Yes
Computer Monitor	Blocks all interactions with the covered face except for right clicks.	4x Aluminium Plate, 1x Glass Pane, 1x Glowstone Dust, 1x Lime Dye, 1x Lapis/Indigo Dye, 1x Red Dye	No
Energy Flow Circuit	Blocks all interactions with the covered face except for energy transfer.	1x Lapotron Crystal, 1x Elite Circuit Board 4x Adv. Circuit (IC²/UE), 1x Iridium Plate, 2x Tungsten Plate, 2x Lapotron Crystal -> 4x Energy Flow Circuit	Yes No
Data Control Circuit	Blocks all interactions with the covered face except for Redstone.	1x Data Storage Circuit, 1x Elite Circuit Board 4x Adv. Circuit (IC²/UE), 1x Iridium Plate, 4x Data Storage Circuit -> 4x Data Control Circuit	Yes No
Metal Plates	Mimics the texture of the block which the plate is composed. Blocks all interactions.	Process an ingot of the block you want to mimic in a Plate Bending Machine Process a compressed material block you want to mimic in a Plate Cutting Machine	Plate Bending/ Cutting
Heat Vent	-1,5% EU per operation, requires unobstructed facing	4x Iron Ingot/4x Aluminium Plate, 4x Iron Bars	No
Component Heat Vent	-1,5% EU per operation, requires unobstructed facing	1x Heat Vent, 2x Dense Copper Plate	No
Reactor Heat Vent	-1,5% EU per operation, requires unobstructed facing	1x Heat Vent, 4x Tin Ingots, 4x Iron Bars	No
Advanced Heat Vent	-3% EU per operation, requires unobstructed facing	2x Heat Vent, 1x Diamond, 6x Iron Bars	No
Overclocked Heat Vent	-3% EU per operation, requires unobstructed facing	1x Reactor Heat Vent, 2x Gold Ingots	No
LV, MV, and HV Solar Panel are disabled by default. They can be re-enabled via the Dynamic Config.
LV Solar Panel	As Solar Panel cover, but produces 8 EU/t during the day and 1 EU/t during the night.	8x Solar Panel, 1x Electronic Circuit	No
MV Solar Panel	As Solar Panel cover, but produces 64 EU/t during the day and 8 EU/t during the night	8x LV Solar Panel, 1x Transformer Upgrade	No
HV Solar Panel	As Solar Panel cover, but produces 512 EU/t during the day and 64 EU/t during the night.	8x MV Solar Panel, 1x HV-Transformer Upgrade	No

Redstone Covers :

Type	Effect	Recipe	Assembler
Item Detector	Outputs a Redstone signal depending on stored items	1x Weighted Pressure Plate (Heavy), 1x Iron/Aluminium Plate	Yes
Liquid Detector	Outputs a Redstone signal depending on stored liquids	1x Weighted Pressure Plate (Light), 1x Iron/Aluminium Plate	Yes
EU Meter	Outputs a Redstone signal depending on stored energy	1x EU-Reader, 1x Iron/Aluminium Plate	Yes
Signalizer	Applies a constant Redstone signal to a machine	1x Redstone Torch, 1x Iron/Aluminium Plate	Yes
Machine Controller	Allows the control of a machine or other covers through Redstone signals	1x Lever, 1x Iron/Aluminium Plate	Yes
Active Machine Detector	Outputs a Redstone signal depending on work progress.	1x Redstone Comparator, 1x Iron/Aluminium Plate, 1x Redstone Torch	Yes
Conductor	Throughputs the strongest incoming Redstone signal to the cover facing	1x Redstone Dust, 1x Iron Plate	Yes
Wireless Redstone Covers :		These covers are for sending or receiving wireless Redstone signals
Transmitter (IN)	Transmits signals coming from the attached machine	2x Redstone Torch, 2x Certus/Nether Quartz/Dust (AE/vanilla), 2x Redstone Comparator, 1x Advanced Circuit (IC²/UE),1x Silver plate, 1x ender pearl or shapelessly craft a Transmitter (OUT)	No
Transmitter (OUT)	Transmits signals coming from outside the attached machine	Shapelessly craft a Transmitter (IN)	No
Receiver (IN)	Receives signals, outputs into the attached machine	2x Redstone Dust, 2x Certus/Nether Quartz/Dust (AE/vanilla), 2x Redstone Comparator, 1x Advanced Circuit (IC² /UE), 1x Gold plate, 1x ender pearl or shapelessly craft a Receiver (OUT)	No
Receiver (OUT)	Receives signals, outputs out of the attached machine	Shapelessly craft a Receiver (IN)	No

To set the frequency of a Wireless Redstone cover, right click the cover with an item. Each item has its own frequency. You can further adjust the frequency with a Screwdriver.