These are black Fullmark brand ribbon cartridges for a variety of older printers, especially daisywheel models. Sometimes they are sold in a cardboard box of six, with individually sealed ribbons. Read on to learn more about them and the printer models the F567 BKMS can be installed in...

The box indicates that they are compatible with the Diablo Hytype II and 630, the CPT Rotary V, the Facit 4156 and 4565, the Philips P5000 and WPS5000, the TEC F-10, F-15, and F-40, the Nixdorf 515, 837, and 8840, the Xerox 630 and 900, and the Juki 6200, 6300, and 6500.

However, these are not the only printers they will work in. Compatibility with the Tandy DWP-230 has been confirmed. Considering that the 230 uses the same Tandy ribbon as the DWP-210 and DWP-520, the Fullmark F567 BKMS is probably compatible with them as well.

Based upon their Fullmark model number (the "MS" part), these are most likely Multi-Strike ribbons. This type lasts longer and costs more than a basic fabric printing ribbon. These ribbons retain some value because many of the compatible printers are very durable and heavy-duty.