Permanent marker, writes on most surfaces. It is suitable for writing on concrete, stone, wood, film, foil, metal, paper, plastic, rubber, glass, porcelain. Non-drying, alcohol-based ink, odorless. Resistant to water, abrasion and weather. Ventilation protector, lasts even 14 days without a protector. Color: black Track width: 2.5mm, Cylindrical tip