The UNI PIN PIGMENT 0.05MM BLACK 200 fineliner is an ultra-fine fiber-tip marker designed for technical drawing, architecture, and extreme detail work. It features Uni Super Ink pigmented ink, which is completely waterproof, lightproof, and solvent-resistant, preventing smudging even when used with watercolor markers. Its extra-fine 0.05 mm tip allows for meticulous hatching, microscopic contours, and high-precision calligraphy. The dense black tone ensures perfect contrast on sketch paper or tracing paper. The ideal tool for illustrators, architects, and meticulous designers.