caliart 100 colors artist alcohol markers dual tip art markers twin sketch markers pens permanent alcohol based markers with case for adult kids coloring drawing sketching card making illustration caliart alcohol based & permanent markers with 100 vibrant colors( 99 colors and one colorless blender ).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;