: Good for crush resistance and often used for canned goods.

: Two layers of flutes; essential for heavy (over 20kg) or fragile goods that might be stacked.

Cardboard is a broad term; for shipping or storage, you generally need , which uses a wavy "flute" for strength. Wall Construction : Single-Wall : Standard for items up to 20kg.

: Used for industrial machinery or maritime export. Flute Profiles (Thickness) :

: The most versatile, standard shipping profile.