Faber-Castell Polychromos Artists' Single Pencil - Colour 143 Cobalt Blue Thick 3.8 mm lead, Soft, vibrant colour laydown High-quality acid-free pigments in bright colours, unsurpassed lightfastness Water-resistant and smudgeproof High break resistance due to Secural bonding process (SV) Available as individual pencils or in various assorted sets