Return Program toner cartridge lets you change cartridges less, save more per print, and reduce your environmental footprint. Toner produces outstanding results page after page, year after year in Lexmark C748 Color Laser Printers. Return Program cartridges are patented print cartridges sold at a discount in exchange for the customer's agreement to the license requirement that the cartridges will be used only once and returned only to Lexmark for remanufacturing or recycling. These patented cartridges are licensed for single use only. Cartridge yields approximately 10,000 pages.