Aoou 130ml Compatible HP72 Ink Cartridges: Compatible Printer: HP DesignJet SD Pro, DesignJet T1100, T1100ps, T1120, T1120 SD-MFP, T1120ps, T1200, T1200ps, T1300, T2300, T2300 PostScript, T610, T620, T770, T790, & T795 NOTE: 1.Please confirm your Printer Model before placing order. 2.To prevent the static affect the stability of the chip, please do not touch the chip. 3.Please check the insertion direction of the ink cartridge during installation and be assured to plug several times if it is hard to install. 4.If the ink cartridges do not recognize your printer at the first time, please use eraser or cotton swab to clean the chips softly, then reinstall the ink cartridge and restart the printer. 5.After installing a new cartridge, if streaks happens, try realigning the printer head and then clicking the printer cleaning option, which should resolve the issue. 6.These ink cartridges contain high quality ink that is engineered to produce superb results which are manufactured under the strict quality control. Any issues please feel free to contact us: