PITT Artist Pens from Faber-Castell feature pigmented India inks that are lightfast, acid-free and pH neutral. The ink is odorless, waterproof and permanent once dry on porous surfaces and they work beautifully on all types of papers and canvas. The ink will also not bleed through paper. Designed for deep detail, the different nib sizes are ideal for bullet journaling, sketching, illustrating and hand lettering. The Extra Superfine, Superfine and Fine pens are a go-to for adding fine lines, while the Medium is the perfect size to make a statement. The convenient wallet is made of 100% recycled plastic and provides storage for on-the-go artists.Details:BlackIncludes assorted nib sizes4 pensPigmented India inkWaterproof and permanentOdorless and lightfastAcid-free and pH neutralDoes not bleed through paperIdeal for journaling, sketching, illustrating and hand letteringIncludes wallet for storageContents:0.1 mm Extra Superfine pen0.3 mm Superfine pen0.5 mm Fine pen0.7 mm Medium pen