LxTek Remanufactured Ink Cartridge Replacement For HP 21 (2 Black) C9351AN These LxTek remanufactured ink cartridges contain high quality ink that has been formulated for optimum performance. All cartridges have been tested to ensure a hassle free printing experience. Package Contents: 2 Pack of LxTek Remanufactured HP 21 ink cartridges - 2 Black Compatible Printers: DESKJET F300 DESKJET F310 DESKJET F325 DESKJET F335 DESKJET F340 DESKJET F350 DESKJET F370 DESKJET F375 DESKJET F380 DESKJET F385 DESKJET F390 DESKJET F4135 DESKJET D1368 Printer. List may not contain all models. Page Yield : 190 Pages per Black (pigment ink) Cartridge at 5% coverage Warranty: All products come with a 1-year limited warranty / Shelf Life: All products have a shelf life of 18-24 months