Below is a list of Postal Tubes manufacturers from Beloit, Wisconsin. Postal tubes are a type of mailing or shipping tube used to safely transport items that are able to be rolled into a cylindrical shape through the mail, or packaged into other items for transportation purposes. They help ship products like posters, blueprints, signs, banners and important documents that cannot be folded and must remain uncreased. Valuable items such as artwork or paintings can also be shipped using postal tubes.