COPIC markers are fast drying, double-ended refillable markers featuring permanent, non-toxic ink. The Sketch Marker, with the Super Brush nib, is perfect for doing professional illustration, fashion design, Manga, and adding detail to your images. The Sketch Super Brush nib acts like a paintbrush both in feel and color application. For more control, use the Medium Broad nib on the opposite end of the marker. Optional replacement nibs are available.