If this is your first unit we urge you to add the installation DVD for hassel free installation. If you already know how to install then you will recieve a $10 discount - Please select "No thank you in options." =============================================== This Print Magic continuous ink system is designed ONLY for the EPSON T50 -The Inking System is ready to install into printer. Inks have already been pre filled in the containers and re-filling is super simple. Just pour ink into chambers. Full instructions are included & helpful hints & tips are also given to keep your system hassle free. ================================================================================ We Recommend Print Magic inks to keep system running smoothly.