Create your own unique designs on fabric or paper using this Micron fine line pen set from Pigma. You can also use these pens to create comic strips in your journal or sign important legal documents. Details:BlackSize 05 (0.45 mm)6 packs (6 pens per pack, 36 total pens)Does not feather or smear when dryWill not bleed through most papersWaterproof, archival quality, permanent, fade- and chemical-resistant Pigma inkMeets ACMI non-toxicity standardsConforms to ASTM D-4236Not for use on fabrics that will be washedNot for use on skin