Refills for Pentel Colour Brush Pens. (XGFL) Valve-activated, nylon brush tip pen for smooth flow, without leaking. 12 vibrant colours to choose from. Brightly coloured liquid ink flows easily, dries quickly and produces transparent water colour effects. Portable, neat and easy-to-use versus traditional paint and brushes: Ideal for painting on location. 150m writing distance.