The central aperture of the ribbon is the aperture affects the compatible model please check the central aperture of the original ribbon carefully before purchasing These typewriter spool ribbon is suitable for most typewriters. Ribbon has fresh ink, which will bring you a good use experience And it will not be a ribbon that has been left for many years so you don't have to worry about using it the provided typewriter ribbon has black inks, easy to distinguish, which is more convenient for you to use in your work. These typewriter spool ribbons are suitable for most typewriters you can use them to replace the old or broken ones, easy to replace and use very suitable for office