Ink Toner Remanufactured Ink Cartridge Replacement for HP HP OFFICEJET PRO K550 YELLOW INK CARTRIDGE ( Black,Cyan,Magenta,Yellow , 4-Pack ) 1.Replacement for C9396AN C9391AN C9392AN C9393AN 2.Include 1 x HP88XL Black, 1 x HP88XL Cyan, 1 x HP88XL Magenta, 1 x HP88XL Yellow Compatible Ink Cartridge 3.Compatible for HP OfficeJet Pro K-5400, K-5400-dn, K-5400-dtn, K-550, K-550-dtn, K-8600, K-8600-dn, L-7480, L-7500, L-7550, L-7555, L-7580, L-7590, L-7600, L-7650, L-7680, L-7700, L-7750, L-7780 Printers 4.Premium Quality Replacement Ink Cartridge is made by ISO9001 Certified Factory 5.good after-sales service