Inkcool 2 Replacement ink cartridges for C9396AN 88 88XL BK Black Ink Cartridges for HP OfficeJet Pro L7750 L7780 1.Packing list: Black-2pcs 2.one year warranty 3.Fast shipment 4.ISO9001Certified 5.Compatible for:HP Officejiet pro k550/k550dtn/k550dtwn/K5400/K8600/L7480/L7580/L7590/L7680/L7780