These black 0.45mm pens offer the same quality Pigma Ink performance as the regular Pigma Micron pens with a plastic nib suitable for everyday, multi-purpose writing. The durable plastic nib (PN) provides skip-free writing, and a fine or medium line width (.4mm to .5mm) can be achieved, based on writing pressure. The polyacetal nib structure allows for smooth ink-flow whether writing fast or slow writing for right or left-handed users by writing at an angle. Ideal for use on paper. Pigma archival quality ink is waterproof, chemical and fade-resistant, bleed-free, quick drying, and pH neutral. Meets ASTM and ACMI non-toxicity standards and is AP seal certified.