Whether youre drawing, sketching or writing, the rOtring Tikky Graphic Fineliner Pen, Black Ink, 0.3 mm gives your ideas more detail with its superior performance. This innovative 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 its time for a new pen with the ink level window. This ensures that you always have the right pen to meet your needs.