Remanufactured Black Laser Toner Cartridge for Okidata 52123601 B710dn/B710n/B720dn/B720n/B730dn/B730n By INKUTEN &copy; For use in the following printers: B710dn/B710n/B720dn/B720n/B730dn/B730n. Model: 52123601. Premium Quality Replacement Laser Toner Cartridge is made by ISO9001 Certified Factory to Meet OEM Standards. Approximate Page Yield: 18,000 Page Yield. Lifetime Warranty from us & will not void your printer warranty.