These pens are perfect for everyday writing. They have a durable, flexible nib for fine to medium line widths. This package contains three .45mm pens, red, blue and black. Archival quality ink is waterproof, chemical and fade resistant, bleed free, quick drying and pH neutral. Conforms to ASTM D 4236. Write on the back of photos or use for fine writing on those pedigree charts or daily journaling. Package size: 3" wide x 7.6" tall. Pen size: 5.25" tall.