This transfer ribbon is for use with brother fax machines for use with the pc 70 cartridge this brother pc74rf thermal transfer ribbon is supplied in a pack of four official brother product made by brother each 144 sheet refill ribbon will produce sharp and clear text essential when you are receiving faxes this four pack of refill ribbons help achieve low costs per copy and the full pack will print over 550 copies easy to install and use these print ribbons can be used