Kuretake Brush Pen No. 14 also called, Keitai Fude Pen Kouhitsu, offers lush black ink and varying line widths depending on applied pressure. Brush Pen No. 14 is a water-based dye which means it will reactivate with water also easy for blending and shading techniques. Brush Pen No. 14 is great for all artists from graphic designers to writers.