What is this?

It does exactly what it says on the box: pressure is not simulated inside it, similar to the Gravity Wall. 

Why do we need this?

Some parts of my creations break under very light pressure that I wouldn't know was generated. When I put them inside an Airblock Wall, they break due to pressure.

@INFINITY-BOI (View Post)

 I know that, but I require a wall in which pressure is not simulated at all.