For an inkjet cartridge that can provide professional-quality results from your Stylus Pro 3800 large format printer, you need this Epson T5803 Magenta Cartridge. Epson has worked tirelessly to make sure that its cartridges get the best out of their printers, providing prints that no compatible cartridge can attain. This cartridge is packed with 80ml of magenta ink for vibrant and long-lasting print output with Epson's proprietary UltraChrome K3 ink.