The Oki 43979201 Black Toner Cartridge is a genuine, original product specifically designed for OKI Data printers like the B420 series. This laser print technology ensures high-quality black prints, making it ideal for professional documents and images. With a unit quantity of 1, this new and sealed toner cartridge is compatible with select OKI models, providing reliable and consistent printing results. Perfect for businesses or individual users who require consistent and professional-looking prints, this black toner cartridge is a dependable choice for those looking to maintain the quality of their OKI printers.