Toner Refill Store's premium compatible Okidata black toner cartridges contain brand new parts and are 100% guaranteed to meet or exceed your expectations and surpass the print quality of the OEM (Original Equipment Manufacturer) Okidata MB790F. Our Okidata MB790F monochrome toner cartridges are made from the highest quality materials and are manufactured in an ISO-9001 certified factory. We also carry numerous toner refill kits which allow you to go green and SAVE! Toner Refill Store supplies each cartridge with a brand new smart chip which will get rid of your 'low toner' message. The use of our premium compatible laser toner cartridges for the Okidata MB790F does not void your printer's warranty. Our Okidata MB790F high yield laser toner cartridges have a 'One Year 100% Satisfaction Guarantee'.