Hi Ink 564XL Ink Cartridge with Chip Relacement for HP564XL PhotoSmart C6340 C6350 C6380 B8550 B8553 B8558 C309C (2 PACK BLACK) 1 Year Warranty, 100% Compatible,With newest generation chips, show the correct ink level Compatible Printers: HP DeskJet 3520 3521 3522 3525 3526 Officejet 4620 4622 Photosmart BB550 C3640 C6350 C6380 D5445 D5460 D7560 5510 5511 5512 5514 5515 5520 5522 5525 6510 6512 6515 6520 6525 7510 7515 7520 7525 Printers What in box: 2x HP564XLBK