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 and more! The Extra Extra Superfine (XXS) Pitt Artist Pen is the smallest nib available at 0.05 mm. Although it is the smallest nib, it is protected with a long, metal encasement. The Extra Superfine is designed for deep detail with a nib size of 0.1 mm and the Superfine measuring in at 0.3 mm has a slightly bolder presence, but still small and versatile. The 0.5 mm Fine pen works in a similar way as its companions while the Medium at 0.7 mm is the perfect size to make a detailed statement. The largest of the set, the 1.5mm Bullet pen, creates uniform strokes with high opacity. The convenient wallet is made of 100% recycled plastic and provides storage for on-the-go artists.Details:BlackIncludes assorted nib sizes6 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:0.05 mm Extra Extra Superfine pen0.1 mm Extra Superfine pen0.3 mm Superfine pen0.5 mm Fine pen0.7 mm Medium pen1.5 mm Bullet pen