mailing tube

noun

an elongated cylinder of cardboard, used for mailing rolled-up papers, magazines, etc.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for mailing tube

Historical Examples of mailing tube

In his hand he carried what looked like a small club, but proved on closer examination to be a mailing-tube.
Sube Cane
Edward Bellamy Partridge