- Illustration markers - Twin-tipped design - Non-toxic, lightfast, waterbased ink - Perfect for comic art, hand lettering, and mixed media Create brilliantly luminous marker art or add vibrant accents to your illustrations with Winsor & Newton Promarker Neon and Set. Ideal for comic art, hand lettering, and mixed media crafts, these markers are twin-tipped with a broad bullet nib on one end and a smaller, precision bullet nib on the other. Available in a range of electric hues, the waterbased ink offers unparalleled fluorescence that glows even brighter under UV light. It’s formulated using pigmented, lightfast dyes to ensure your art remains radiant for years to come. Click-fit caps prevent dry-out between drawing sessions.