How do I correctly load a refill for a rollerball pen?

Aurora rollerball pens require no special care. The special liquid ink refill ensures excellent writing comfort. When you are not using your Aurora rollerball pen, always insert the cap, to prevent the ink from drying out. Whenever the color intensity of the section decreases, replace the refill: unscrew the front part of the rollerball pen (fig.1) and insert a new refill, subsequently screwing the tank (fig.2). In some models it is necessary to unscrew the bottom (fig.3), insert a new refill and screw the bottom back (fig.4). You can find Aurora spare parts in different colors at the best retailers.