The Lanier 4250 Fax Toner Cartridges will eject deep and rich black tones, ideal for the small business or office environment. Each Compatible Okidata 52104201 Black Laser Toner Cartridge for your Lanier 4250 Printer has up to a 2 year shelf-life, providing definitive convenience and performance. The Compatible Okidata laser toner cartridges for your Lanier fax system were designed with reliable and dependable specifications to withstand the toughest printing tasks. The Compatible Okidata Toner Cartridges go through a vigorous inspection process before being shipped, to ensure outstanding printing results. And all of our Okidata Toner Cartridges are backed by a 90 day money back guarantee.