Pentel Colour Brush Pen is now available in various vibrant beautiful vivid translucent colours. Valve-activated for smooth flow, without leaking. Synthetic fibre tip retains its shape. Refillable with Pentel FR-T refills. Pentel Colour Brush Pens offer artists beautifully vibrant dye-based ink in a brush pen with nylon bristles. The ink blends between colours and can be washed with water for watercolour-like effects. We recommend using these brush pens smooth watercolour paper or bristol board, or a watercolour sketchbook and waterbrush for expressive and colourful artwork whilst you are out in the field. Product Details Nylon brush tip pen filled with water-based ink 18 vibrant colours to choose from Create beautiful, vivid, translucent, watercolour effects Valve-activated for smooth flow, without leaking Synthetic fibre tip retains its shape Convenient, portable alternative to traditional brushes Refillable cartridges Innovative watercolour brush for calligraphy, illustrations & sketches The radiant colour ink flows easily, dries quickly and creates transparent watercolour effects High-quality nylon brush tip for variable line widths of 1-10 mm The included water-based dye ink can be mixed with water Refillable with replacement cartridge FR