You won't find these art supplies anywhere else. Explore our huge range of exclusive art materials to Cass Art. Working with the world's best art brands such as Winsor & Newton, Liquitex, Daler Rowney, Posca & and many more, browse a wide range of professional materials suited for all types of artists. Shop watercolour, acrylic and oil paint sets, paper, brush sets, graphic markers & more, all at great value prices in store and online.