Autoquill Fineliner (3 Pack)- Fine Point Black Ink Pens - Perfect for Artists & Writers - Illustration, Graphic Design, Journaling, Writing, Office Documents, DIY Craft Projects, Technical Drawing Crisp, fade resistant lines make your letters and artwork look great now and far into the future. Waterproof, archival-quality pigment ink can be used with watercolors and art markers, and in acid-free environments. Consistent ink delivery for skip-free writing & drawing. Durable PVC Box makes them easy to travel with and keep organized. Works great with Airships Sketchbooks & Journals!