Faber Castell-PITT Artist Pen Gift Set. Made with high quality pigments, Faber-Castell PITT Pens have acid-free archival India ink. They are odorless, permanent, lightfast and smudge proof/waterproof when dry. Unlike traditional markers they will not bleed through paper. Use on canvas, fabric, wood and ceramics. The brush nib can be refreshed by simply taking it out and turning it around! This 6x6x4 inch package contains sixty PITT artist pens in assorted colors. Acid free. Archival quality. Conforms to ASTM D4236. Imported.