The Okidata B721dn laser printer uses the OEM Okidata laser toner cartridges and supplies. Our compatible toners for Okidata B721dn are manufactured to meet the same original specifications and performance standards as the Okidata OEM laser toner cartridges. We offer a 100% Quality Satisfaction Guarantee on alternative laser toner cartridges and supplies for use in the Okidata B721dn.