The flute! Everything you wanted to know about flute and fluting but were afraid to ask
Amazon.com: Pratt PRA0014 Recycled Corrugated Cardboard Single Wall Standard Cube Box with C Flute, 7" Length x 7" Width x 7" Height, (Pack of 25) : Industrial & Scientific
Products & Service | Onboard Corrugated
Cardboard Flute Design – Different Flutes for Different Purposes | Production Packaging Innovations