Polychromos artists' pencils are high-quality acid-free pigments in bright colours and unsurpassed lightfastness. Polychromos coloured pencils shine through, whether they are used for graphics, artistic free style or for the exact rendition of plans. Water-resistant, smudge-proof and high break resistance due to secural bonding process. Pencils are 3.8mm thick. Wooden case includes 120 pencils.