E-MALL Remanufactured Ink Cartridge Replacements for Lexmark 4 18C1974 Black Color Ink Cartridge Compatible With Lexmark X2690, X3690, X4690, X5690, X6690, Z2390, X2490 (2 Black) Black Lexmark 4 ink cartridge contains 18ml, yields up to 500 pages per cartridge @ 5% coverage. Compatible Printers: Lexmark X2690, X3690, X4690, X5690, X6690, Z2390, X2490 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.