Enjoy exceptional reliability and high quality prints from your Lexmark E series laser printer by installing a genuine Lexmark Black Return Program Corporate Toner Cartridge (E250A31E). Your Lexmark laser printer will display an orange light above the Toner Low icon on the control panel when it's nearly time to replace the cartridge. Keep a spare one handy so you can restart printing with the minimum of fuss. This economically-priced cartridge comes packed with enough toner to print 3,500 pages.