Microperm Permanent Black Fine Line Pen 3-Pack, draws an ultra fine line on nearly any surface including templates, metal, glass, fabric, wood, and cellophane. Creates incredible detail where precision and permanence are required. Waterproof and fade-resistant black ink. Use for crafts, lab equipment, film, and labels. AP non-toxic. Set includes: .25mm, .35mm, .45mm. Contents subject to change. Non-toxic