Features: 1.The product is free of toxins, safe to use, will dry immediately after writing. 2.Oily ink,smooth writing,waterproof,sunscreen,no fade. 3.Can be written on any surface, metal, glass, wood, plastic, paper, etc. 4.High-quality tip smooth surface media for smoother writing,very practical. 5.High color saturation, bright colors, even color, less traces of strokes, long lasting. specification: The product is free of toxins, safe to use, will dry immediately after writing. Oily ink,smooth writing,waterproof,sunscreen,no fade. Can be written on any surface, metal, glass, wood, plastic, paper, etc. High-quality tip smooth surface media for smoother writing,very practical. High color saturation, bright colors, even color, less traces of strokes, long lasting. : Size:0.7 mm/0.03 in needle Weight: 142 g/5 oz Color:red, black, blue, green, orange, purple, pink, white, gold, silver, brown (brown), yellow Package List: 12*Painting Pen Usage: shake the pen several times to mix the ink in the pen tube evenly, erect the pen, and push the pen up.Press the pen tip for about 3-4 seconds then release.Press the pen down several times until the ink oozes out. Note:when the pen is not written out of all ink, put the cap on it and place it vertically downwards so that the color will not change next time.