The original and iconic markerThe Sharpie Fine Permanent Marker contains quick-drying water-resistant ink that permanently marks most surfaces including glass, metal, photos, foil and most plastics. These pens come in a pack of 12 assorted colours and each one produces a line width of 1.0mm.They have resilient tip which resists abrasion and the tough polypropylene barrel stands up to almost anything.Each cap indicates the colour of each pen cap approx. 1mm line width.