Fax machines, just like any other office machine, require supplies to function properly. The most important supplies for a fax machine are fax rolls or cartridges, which are used to print out received faxes. These rolls or cartridges come in various sizes, depending on the model and brand of the fax machine. Another important supply for a fax machine is the thermal transfer film, which is used in thermal fax machines to print out received faxes. The film is heated by the fax machine's thermal printhead, causing the ink to transfer onto the paper.

In addition to these supplies, fax machines may also require other accessories such as replacement toner cartridges, drum units, and maintenance kits. When purchasing fax machine supplies, it is important to ensure that they are compatible with your specific model of fax machine. Using the wrong type of supply can result in poor quality prints, damage to the machine, or even complete failure of the device.