Fax machines remain a popular method of both communication, printing and duplicating documents and genuine fax rolls like this Brother PC304RF remain the most reliable and aesthetically pleasing consumable. The Brother MFC-925 (and all other compatible facsimile machines) use thermal printing technology to produce high quality black and white images with the PC304RF rolls.Designed by Brother to give you an estimated 235 pages from each roll, the PC304RF represents a low cost per page. This original Brother PC304RF pack contains 4 fax rolls that comes fully guaranteed to impress!