Dual Tip Markers : Broad and fine tips are perfect for your different needs. The wide tip is suitable for creating quick visual effects and filling in large areas, the fine tip for details and the treatment of very precise lines. Vibrant and Overlay : Alcohol markers are oil-based, with strong color coverage, and different colors can be easily mixed and overlapped. Suitable for children's daily handwriting, art class drawing, animation, professional design, etc. Widely Applicable : The permanent markers can be used on plastic, glass, wood, metal and textiles. Ink capacity: each pen contains 3.5 grams of extra large capacity ink, which can draw at least 300 meters away, after which the color will get lighter. Non-Toxic : Art markers is made without any harmful elements, the ink is 100% safe for kids to use. Children under three years old are recommended to be accompanied by their parents. Dual Tip Markers : Broad and fine tips are perfect for your different needs. The wide tip is suitable for creating quick visual effects and filling in large areas, the fine tip for details and the treatment of very precise lines.