Great Savings on Okidata B431dn Cartridges & Supplies. Lowest Price, Top Quality & Fast Shipping! The cartridges we offer are new compatible with 2 year warranty and 100% satisfaction guarantee. The products are made to meet the highest level of reliability, performance and outstanding page yields. Purchasing our Okidata cartridges not only saves you money but also guarantees print quality. The cartridges are easy to install and they print professional-looking documents, reports, charts and graphics.