Product Description PM-701 Blue Refill for Permanent Marker Whether you are doing traditional lettering, illustrations, or manga, Zebra Zensations Brush Pens are the tool for you offering deep rich black color and varying lines widths depending on applied pressure. Brush Pen Tip Allows for Thick and Thin Lines in One Expressive Tool Permanent Pigment Ink is Acid Free and Archival Quality for Lasting Impressions Water Resistant Cap Snaps Tight to Maintain Pen Freshness and Life