Tombow Dual Brush Pen Art Marker, 443 - Turquoise, 1-Pack Dual-tip marker 443 - flexible brush and fine point hard nylon tips - turquois Nylon tip springs back to hold its shape - stroke after stroke Water-based allows tip to be dipped in water for subtle lines Ink draws from a single ink reservoir for exact color match Odorless  nontoxic and acid -free