Spectrum Noir Marker Set, Blue, 6 Piece Perfect for artists, rubber stampers, paper crafters, adult color books and more Each marker is double-ended - bullet tip for detail work & broad chisel nib for filling larger areas Contains pre-matched color tone family with 3 "warm" colors and 3 "cool" colors Achieve professional results with effortless shading, blending and color matching Acid free, non-toxic and safe to use