sta Dual Brush Pens Brush Markers Dual tips design, 0.8 mm fine tip for outlining, 1 - 2 mm brush tip for blending and coloring 24 assorted colors, great for adult coloring books, drawing, card making and art projects, etc. Non toxic and odorless, water-based ink and great for blending colors Using your brush pen case as a pallet, apply a dark color to your pallet, using a lighter color brush pen, pick up the dark color off your pallet Not recommend for children under the age of 3 years