E-MALL Remanufactured Ink Cartridge Replacements for Lexmark 4 Black 18C1974 and Lexmark 5 Color 18C1960 Ink Cartridge for Lexmark x2690/3690/4690/5690,z2390/2490 Printers (1 Black, 1 Color) Black Lexmark 4 ink cartridge contains 21ml, yields up to 550 pages, Color Lexmark 5 ink cartridge contains 15ml, yields up to 800 pages (per cartridge @ 5% coverage) Compatible Printers: Lexmark Z2300/2310/2320/X2600/2670/2650 Print Effectiveness: Make printing smoother, natural looking images and fewer granularities, producing best looking prints ever. Inks stop to come out automatically when printing is over. Technology: E-MALL ink cartridges are adopted the leading Print Head Cleaning Technology, Print Head Testing Machine Technology, Eco Friendly Technology, Zero-energy Technology. The cartridges underwent an extensive process including, cleaning, testing the chip, ink vacuum refilling, totally pass to 27 production lines. All cartridges reach the standard when they are tested in any severe environment. Warranty: CE, TUV, ROHS, ISO9001, ISO4001 International Quality Certified.