Corrugated fiberboard has two main components: linerboard and the medium. Linerboard is the flat surface of the box and fluting is the wavy medium attached to the linerboard. There are four types of corrugated structure:
- Single Face: One flute and one linerboard
- Single Wall: One flute between two linerboards
- Double Wall: Two flutes within three linerboards
- Triple Wall: Three flutes within four linerboards
