The ideal marker to write and decorate all surfaces! It writes on paper, plastic, glass, metal, and fabrics. Perfect for writing on photos, greeting cards, decorating bags, and many other items. Water-based marker ideal for posters. Vibrant colors, even on black surfaces. Transparent and opaque ink. Does not bleed through thin or porous paper. Writes on all surfaces. Non-toxic. Ink has no odor. Line width: 8.0 millimeters.