Box of 12 Pitt Artist Faber-Castell shades of gray markers Contemporary artistic marker for drawing, sketching and painting with ink and brush tip in gray tones. Perfect for artists, graphic designers, creatives, illustrators, architects and anyone passionate about creating color drawings. Acid-free ink and neutral pH. The ink is resistant to sun exposure. After drying, it is waterproof and does not leave stains on the paper. High quality brush tip ensures maximum flexibility and reliable ink flow. Pigments of the highest quality. Brand: Faber-Castell.