INKTONER Remanufactured Toner Cartridge Replacement for HP 88 ( 2-Pack ) 1.Listing includes: 1* Black&Yellow+1* Magenta&Cyan Printer head. 2.Replacement Printerhead ( Not made by HP ). 3.All products covered by a 100% satisfaction guarantee and 90 days warranty. 4.Our vows: we can provide a guarantee to every customers who purchased our products, once there are any problems, we will make all our efforts to help you and if you don't want to posses it , we can offer you the full refund. 5.Compatible with:Hp Officejet Pro K5300 K5400 K550 K8600 L7480 L7580 L7590 L7680 L7780