Single Face
Board made from one layer of fluting and one liner.
Board can be B, E and C flutes
Single Wall
Board made from one layer of fluting sandwiched between two liners.
Boards can be C, B and E flute
Double Wall (Topless)
Board made from 2 layers of fluting sandwiched between 2 liners.
Boards can be BC and BE flutes.
Double Wall
Board made from two layers of fluting sandwiched between three liners.
Boards can be BC or BE flute.
Triple Wall
Board made from three layers of fluting sandwiched between four liners.
Boards can be BBC, CBC, EBC or EBE