Valve-action Structure:SHAKE WELL BEFORE EVERY USE; Great control of ink and gas, High-Technology, Archival Quality, Safe for Use by Children
Vibrant 21 colors:Copper, Silver, Gold, Brown, Pink, Glowing green, Hot orange, Zesty lemon, Hot pink, Violet, Blue, Brilliant blue, Green, Yellow, Orange, Red, White, Black, Vivid Violet, Radiant Red, Fiery Amber
Ink Certificated: Conforms to ASTM D-4236 certificate, non-toxic and acid free.
Weather Resistant: Water and Scratch resistant, Non-fading in nearly all weather and quick drying
Smooth Writing: Writes on nearly any surface with your imagination and creation, allowing you to easily write on metal, paper, stone, rubber, ceramics, wood, canvas, glass, plastic and more