Faber-Castel PITT Artist Manga Pens, Shades of Gray, 8-Pack (167107) PITT Artist Pens- Manga Set of Eight Assorted Pens These pens offer maximum light-fastness and waterproof ink that is acid-free The ink is pigmented (not dye based) This Manga set comes with five shades of gray that have a fine flexible brush It is an ideal set for doing preliminary drawing and shading