SAKURA-Pigma Micron 0.25mm. This fine-point drawing and writing pen offers waterproof, quick-drawing pigment ink that will not feather or bleed through even the thinnest papers. Inks are smearproof once dry and fadeproof against sunlight or UV light. Colors remain vibrant and are permanent and washable on cotton fabrics. Micron pens will not clog or dry up. This package contains one Pigma Micron 01 pen (0.25mm tip) blue pen. Archival quality and acid free.