HP 70 Printheads are ideal for professional photographers and graphic designers producing museum-quality fine-art and photography prints, proofs and full-colour reproductions with long-lasting image stability and crisp, beautiful colours.Compatible Printers: HP DesignJet Z 3100 Series, HP DesignJet Z 3100 44 Inch, HP DesignJet Z 3100 GP, HP DesignJet Z 3100, HP DesignJet Z 3100 24 Inch, HP DesignJet Z 3100 GP 24 Inch