SPEED Remanufactured Ink Cartridge Replacement for HP 564XL ( Black , 2-Pack ) HP 564BK ink tank contains 20ml, yields up to 550 pages per cartridge @ 5% coverage. Compatible Printers: Photosmart 5510, Photosmart 5511, Photosmart 7515, Photosmart 6525, Photosmart 5514, Photosmart 6512, Photosmart 7520, Photosmart 6510, Photosmart 5512, Photosmart 5520, Photosmart 6515, Photosmart 6520, Photosmart 7510, Photosmart 5515, Officejet 4622, Officejet 4620, Officejet 4620e, Deskjet 3521, Deskjet 3520. 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: SPEED 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.