This is a pack of 2 1/2-inch replacement typewriter ribbon on 2" spools. These ribbons are suitable for most vintage manual typewriters with black and red ink. The ribbons are sealed in plastic sleeves, have reversing grommets, and come in a cardboard box. **RIBBON FEATURES** These typewriter ribbons come in dual-color black and red ink on universal 2-inch plastic spools. The ribbons have two automatic reversing grommets that allow the ribbon to reverse direction once it reaches the end in machines with this feature. (Not all typewriters have this ability, but most do.) **SUITABLE MODELS** This replacement typewriter ribbon is suitable for most (but not all) vintage manual typewriters, both standard and portable versions, including Royal, Brother, Olivetti, Smith-Corona, Olivetti, Adler, Remington, Sears, Underwood, and more. **WINDING RIBBON ONTO PRE-EXISTING SPOOLS** Even if you have a typewriter that will not accept these spools, the ribbon itself can be used in any machine that accepts 1/2" ribbon. If the spools do not fit you can use appropriately sized spools (the ones already on you machine) and wind the ribbon onto those.