The UNI PIN PIGMENT 0.40MM BLACK 200 fineliner combines versatility and durability in a high-quality calibrated marker. The 0.4 mm diameter tip is perfect for both everyday writing and medium-thickness illustration outlines. The pigmented black ink is waterproof and fade-resistant, ensuring your sketches and notes maintain their original quality without fading. The metal casing protecting the tip provides greater durability even when used with rulers. Ideal for art students, graphic designers, and sketchbook writing.