The Tria System is one of the most precise and complete range of markers, cartridges,iInks and accessories available to artists and designers today. Tria is the only marker that features three built-in nibs (chisel, fine, brush), providing you with a wide range of strokes and consistent line widths. Tria inks are alcohol-based and non-toxic, providing quick drying, even color laydown. The translucent quality of the inks means they can be overlaid and blended for a variety of stunning visuals. Refilling is quick, economical and mess-free. Cartridges are available separately and simply click into place. Tria markers come in hundreds of colors specially formulated to meet the needs of today's designers and artists.