Color plate sandwich panel 75mm, 0.
The 75MM is the insulation thickness of the insulation board .050MM is the thickness of the insulation board with the color of the plate, the professional point should be called on the next 5, or what, is the top of the top plate thickness, the next is the next look at the house To the thickness of that side
If you are the wallboard, that is, two sides are flat look, 0.50 is a side of the color plate thickness, usually outside the house to see that side, the house did not explain the thickness of the normal and outside the same thickness, Hope you can see,
