Marks A Lot markers can be used on virtually any surface, including metal and plastic, and resists water and rubbing to minimize smearing. Durable 1/8"chisel tip lets you write in a bold or narrow line width, from bold, high-visibility strokes to smaller lines. Rich, dark low-odor ink is quick-drying, nontoxic, water and rub resistant. ACMI certified (conforms to ASTM D 4236). Assorted colors.