Inkcool 2pk TOP Quality Hp Remanufactured Hp88 Printhead Bk/y C/m for Use with Hp Officejet Pro K5300 K5400 K550 K8600 L7480 L7580 L7590 L7680 L7780 Printers 1.Packing list: BK/Y printhead-1pcs, M/C printhead-1pcs 2.Shelf Life:12-18 months 3.Fast shipment 4.ISO9001Certified 5.For use with:HP Officejet Pro K5300/K5400dn/K5400dtn/K8600/L7380/L7580/7590/K5400/ K5400dn/K5400dtn/K550/K550dtn/ K550dtwn/K8600/K8600dn/L7480/L7580/L7590/L7680/L7780