Lamy Safari Rollerball Colors: Pastel Pink / Mint Green / Body Material: ABS resin Ink Color: Black This is a Lamy Safari rollerball. It is being sold as a set with Blue Macaron / Mint Green. Rollerball pens use water-based ink and are known for their smooth writing feel and the ability to write with light pressure. I have never actually used a rollerball pen myself, so I don't know much about the product. I have included as much information as possible for this listing, so I hope that those who understand the situation will consider purchasing it.