Whether you are drawing, sketching, or writing, the Rotring tikky graphic fineliner three piece pen set gives your ideas more detail with its performance. This fineliner pen is filled with pigmented ink that is lightfast and water-resistant. With Free Ink technology, this pen continuously delivers smooth ink and is long-lasting. Easily see when it is time for a pen with the ink level window. This ensures you always have the pen you need to meet your needs.