Lexmark Optra R+ 1200 1200 Cartridge. Lasts about 14000 pages. Costs about 150GBP us-ascii A Postscript Also speaks PCL level 5. For 1200DPI use Postscript Level 2. Std 2MB RAM adequate for 600DPI Postscript, RAM is expandable to 64MB using 72pin SIMMs.