Double Line Markers: Add a beautiful two-colour effect to your artwork with this set of shimmering double line outline markers. Any colour stacks, covers well, dries to be re-written and the ink colour underneath is opaque.Material: High-strength wear-resistant fibre nib, using oil-based environmentally friendly ink, waterproof, fast drying, no bleed, smooth writing, even ink output, clear handwritingBright Colours: Good gloss, bright colours, pull-out cap design to protect the nib, the cap can be inserted into the end of the pen, is a good helper for drawing.Smooth writing: Ultra-soft bevelled tip for smooth marking, even writing and smooth writing, can be bent to fit the surface of the paper.Widely used: For DIY crafts, paintings, greeting cards, posters, drawings, diaries, etc. The pen body is small and comfortable, easy to carry on the go.