Inkcool High-Yield Ink For HP 950XL 951XL HP OfficeJet Pro 8600 Pro8100 Series 1.Packing list: HP950XL Black -1pcs, HP951XL Cyan -1pcs, HP951XL Yellow -1pcs, HP951XL Magenta -1pcs 2.Shelf Life: 12-18 months 3.Fast Shipment 4.ISO9001 Certified Compatible for HP printer:HP officejet Pro8100, officejet Pro8600,officejet Pro8600 plus,officejet Pro8600 premium