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Corrugated Flutes

The “Flute” describes the structure of the wave shaped cardboard material (medium) that makes up a boards corrugation.

Linerboard is the “flat facing” that adheres to the medium. The three most common flute sizes are B, C, & E. Find out more about corrugated board.

E flute, B flute, and C flute are all cardboard grades that refer to different thicknesses of the corrugated material used in manufacturing packaging boxes.

Flute

Profile

Thickness

Comments

C

3-4mm

  • Good stacking strength
  • Good crushing resistance
  • Very common material

Uses: Glass, furniture, dairy

B

2-2.5mm

  • Good puncture resistance
  • Less space consumed in warehouse

Uses: Canned goods, displays

E

1-1.2mm

  • Good puncture resistance
  • Less space consumed in warehouse

Uses: Canned goods, displays

BC

5-6mm

  • Composed of a combination of B and C flutes. Double wall corrugated board should be used when stronger boxes and extra padding are needed. Excellent for stacking heavy items.