Transition seal

Background
The Transition Seal is a giant door that measures 24x26 blocks. It has a custom opening animation. Considering its height and width, it is very expensive to craft. Good luck finding out a way to integrate this into your base. (It's practically an oversized vault door)

Production

 * 16 Reinforced CMB Bricks (The door is blast resistant)
 * 64 Steel Plates
 * 40 Advanced Alloy Ingots
 * 36 Insulators
 * 24 Blocks of Steel
 * 16 Desh Motors
 * 12 High-Speed Steel Bolts
 * 4 Yellow Dye

Yes it is very expensive to craft.

Cry about it.

Trivia
This vault door is a reference to the Portal 2 franchise, you can see this magnificent door in all its splendor in the level called "Test Shaft 09"