Kuretake Bimoji Cambio Brush Pen Black : Kuretake Bimoji pens are traditional Japanese brushes in modern marker form. Water-based black pigment ink in a bristle-type brush tip. A great tool for both brush lettering and illustrations. The new "Cambio" series features a continuous ink flow system with a solid barrel that doesn't require squeezing to release ink. Plus, when the ink runs out, the barrel cartridges are replaceable !