Rollerball Pens - Lamy Safari - Set of 3 Colors: candy mango, candy aquamarine, candy violet Material: ABS Plastic (Body), Stainless Steel or Aluminum (Clip) Ink Color: Black This is a set of 3 Lamy Safari rollerball pens. 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 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, and I hope to find a buyer who understands the product.