These Faber-Castell Pitt Artist Pens are an interesting medium for artists and graphic artists. They can be combined with many other drawing techniques. The pens provide expression and durability. The pack contains 4 pens providing a variety of line widths such as brush nib, 1.5mm bullet nib, Calligraphy nib in White and a 0.3mm in black. These pens have all the advantages of artist’s ink with the benefits of a modern, easy-to-use pen. Pigmented India ink.  Ideal for sketches, drawings, layouts, fashion design and illustration. High lightfastness.  Waterproof, permanent Odourless, acid-free, pH neutral. Does not bleed through paper.  The pens provide a variety of 4 line widths. Available individually and in various assorted sets. Contents Included 1.5 = 1.5mm bullet nib (white) B = brush tip (white) C = calligraphy nib (white) S = 0.3mm (black)