- The double line outline marker pens adopts the durable fiber tip that is wear-resistant \r\nand pressure-resistant, writes smoother, and has a longer usage than others.\r\n \r\n-- 12 colors available, a beautiful double-line effect for each color.\r\n \r\n-- Premium water-based ink, enviromental friendly and safe, permanent coloring for\r\n \r\nenjoying the fun of art creative, craft, diy and more projects.\r\n \r\n-- Use easily: shake the pen up before each use, then slightly press the pen tip several\r\n times to drain the ink.\r\n \r\nSpecification:\r\n \r\nMaterial: PP\r\n \r\nInk: water-based\r\n \r\nPen Tip Width: 1-2mm\r\n \r\n12 Vivid Colors: Dark blue, light blue, dark gray, light gray, purple, green, yellow, orange, light pink, dark pink, rose red, lemon yellow.\r\n \r\nPacking list: 1* Double Line Outline Markers Pen (12 Pack)\r\n \r\nNote：for the best drawing, re-cap the markers immediately after use and store horizontally.