caliart 40 colors dual tip art markers permanent alcohol based markers colored artist drawing marker pens highlighters with case for coloring animation illustration painting card making underlining caliart alcohol based & permanent markers: 40 vibrant colors.alcohol-based ink, low odor, toxic-free. excellent smudge-proof and waterproof qualities on most surfaces. caliart twin tip permanent markers work well on paper, ceramics, plastic etc. great as art markers, sketch markers, permanent markers, alcohol based markers;