Sharpie Fine Permanent Markers allow you to mark on almost any surface including glass, plastic, wood, metal ,vinyl and more. Each marker contains alcohol based, non toxic ink which is deep and bold. You can use them to mark on glass, plastic, wood, metal, vinyl, photos and more. It has a 1.0 mm fine bullet tip for a bold, consistent line. It is permanent on most surfaces including cardboard boxes, glass and paper. The ink is fast drying, fade and water-resistant and is AP Certified non-toxic. The marker will not dry out if left uncapped for 30 mins and if you recap it will recover overnight. This pack contains 12 black markers.