This is a 6pack compatible Okidata 42377801 Ribbon. This ribbon cartridge is made to compare to the original in terms of both quality and page yield standards. This replacement cartridge for Okidata 42377801 Ribbon cartridge delivers first-rate quality and incredible value. This 42377801 Ribbon compatible ink by Okidata also gives you an economical alternative to buying expensive OEM (Genuine) ink cartridges.