The HP DesignJet PostScript accessory includes a 6 GB memory upgrade, enabling you to increase the efficiency of your printer and easily accommodate large, complex files. Easily and effectively manage and match PANTONE* colors with HP Professional PANTONE Emulation. Create prints emulating solid PANTONE* colors that are optimized for this printer and your choice of media. For Use With: HP DesignJet T900, T1500, T1700, T2500, T3500 Printers.