Chartpak AD Markers, Tri-Nib, 25 Assorted Pastel Colours in Tabletop Cube are professional, xylene-based markers for art and design.The Tri-Nib permanent marker blends and transfers on paper, acrylic, ceramic, egg shell and more.The rich, vibrant colours are perfect for blending and shading, and won't streak or feather.Use with colourless blender (#P-O, Sold separately) to create unique colours, transfer images and produce watercolour-like effects with coloured pencil, graphite and charcoal.Non-toxic, conforms to ASTM D 4236.Made in USA.