Below is a list of Cardboard Tubes manufacturers from Beloit, Wisconsin. Cardboard tubes, or paper tubes, are cylindrical products fabricated from wood pulp which has been made into different varieties of cardboard such as fiberboard, paperboard, kraft paper and paper-adhesive composites. Cardboard tubes are used for a wide variety of functions in different industries and are typically fabricated from ribbons of cardboard wrapped around a mandrel in the desired dimensions.