Corrugated board is divided into different groups based on materials of various grades and thickness of corrugated cardboard. Here is a short description of the most common variants.
* F-Flute (micro corrugated, about 0.75 mm)
* E-Flute (miniwell, approximately 2.0 mm)
* B-Flute (finwell, approximately 3.0 mm)
* C-Flute (heavy cardboard, about 4mm)
* EB-flute (doublewell, about 5mm)
* BC-Flute (doublewell, about 7mm)