Below is a list of Shipping Tubes manufacturers from Saginaw, Michigan. Shipping tubes are manufactured from wood pulp fibers and used, among many other applications, for shipping and mailing a variety of items that are able to be rolled or to fit into a cylindrical shaped container. Ribbons of cardboard are spiral-wound with adhesives to give added strength and dried around a mandrel according to the desired diameter and length of the tube. Paper tubes are manufactured in such as way as to provide structural support across the cross section and the length of the tube.