This is a compatible Okidata 43979206 high yield black laser toner cartridge guaranteed to perform with the Okidata B420dn laser printer. It replaces the original Okidata 43979206 laser toner cartridge. The compatible replacement 43979206 laser toner cartridges and supplies (also known as generic) are specially engineered to meet the highest standards of quality, reliability and exceptional yields that meet or exceed OEM (Original Equipment Manufacturer) standards for the 43979206 Okidata laser cartridge and offer high-quality printing results. Manufactured brand new, containing 100% new components, they are an economical alternative to expensive OEM 43979206 Okidata laser toner cartridges and supplies, and offer big savings over brand-name 43979206 laser toner cartridges and supplies. The use of compatible replacement laser toner cartridges and supplies does not void your printer's warranty. We offer a 100% Quality Satisfaction Guarantee on our compatible 43979206 laser toner cartridges and supplies.