Lamy Safari Rollerball Colors/Body Material: Savannah Green & Terra Red / ABS Resin Ink Color: Black This is a Lamy Safari rollerball pen. It is a set of Savannah Green and Terra Red. Rollerball pens use water-based ink, offering a smooth writing experience and allowing for writing with light pressure. I have never actually used a rollerball pen, so I don't know much about the product. I have included as much information as possible for this listing, so I hope to hear from those who understand the situation.