SPEED&trade; HP 27 and HP 28 Remanufactured Ink Cartridge 1 Black (C8727AN) and 1 Color (C8728AN) 2 Pack for HP Deskjet Series Printer HP 27 Black ink tank contains 15ml, yields up to 280 pages per cartridge @ 5% coverage. HP 28 Color ink tank contains 15ml, yields up to 240 pages per cartridge @ 5% coverage. Compatible Printers: DeskJet 3320, DeskJet 3420, DeskJet 3550, DeskJet 3650, DeskJet 3740, DeskJet 3745, Deskjet 3845, DeskJet 450cbi, DeskJet 450ci, Deskjet 5150, Deskjet 5650, Fax 1240, PSC 1311, PSC 1315, PSC 2210. 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.