Lexmark 20N10K0 Return Program Toner - Black - 1500 Page YieldDelivering consistently outstanding image quality, long life system reliability and superior sustainability in an innovative shake free print system, this Black Return Program Toner Cartridge for the CS331dw yields 1500 pages. Lexmark Return Program cartridges are patented print cartridges sold at a discount in exchange for the customers agreement to the license requirement that the cartridges will be used only once and returned only to Lexmark for