Description Warranty Information Product DescriptionSakura Pigma Micron PN Pens 05 .45mm 8/Pkg-Assorted ColorsFor everyday writing.Durable, flexible nib for fine to medium line widths.Archival quality ink is waterproof, chemical and fade resistant, bleed free, quick drying and pH neutral.This package contains eight .45mm tip ink pens in a variety of colors.Conforms to ASTM D 4236. Manufacturer Warranty - USA Only