Writing line width: 1.0MMSize: 11*132MMColor: 12 colors/18 colors (optional)Package List1 Set * Double Line Outline Pen112/18 color optional flashing two-line outline pen: Multi-color flashing two-line outline pen technology can automatically create outlines to achieve beautiful two-color effects. The center of the outline pen is shiny silver and the sides are colored, which can be made into a very beautiful final product. 2 Double-line outline pen with waterproof function: permanent double-line outline pen, specially developed wear-resistant and pressure-resistant nib writes smoothly and clearly. Oil-based outline pins are chemically stable and light fast. Our ink dries quickly, smoothly, and has good water resistance. 3 Widely used on various surfaces: the double-line outline pen can be used for writing greeting cards, painting, writing, posters, painting, etc. Suitable for almost all smooth surfaces, such as metal, ceramic, wood, glass, plastic and Easter eggs. 4 High coverage: The dual-line flashing outline pen has a unique automatic dual-line and high coverage. The outline pen uses bright ink to create a highly opaque and glittery effect on white paper. 5 Special gifts: The flashing two-line outline pen is suitable for all kinds of exquisite gifts, such as unique scrapbooks, calendars, birthday albums or Thanksgiving/Christmas/anniversary/birthday/wedding cards. It is a sweet gift to make our double line pen.