Amazon.com: Toner Cartridges Made in USA B721 B731 Alternative Toner Cartridge. Yields up to 18,000 Pages. Replacement for use in Okidata B721 B721DN B731 B731DN Printers. 45488801. Made in USA. : Office Products
Okidata 45488801 OEM Black Laser Toner Cartridge for the B721 and B731 - LD Products