PIGMA brush pens feature a flexible brush tip that allows maximum creativity. Create swirls, fine lines and broad brush strokes by applying different levels of pressure. Boasting archival quality ink, these fade-resistant coloured pens are ideal for watercolour, calligraphy, freehand art and fabric projects. Enhance any art project with these vivid colours!Specifications: quick-dry, acid-free, water-based, do not bleed through most papers