... fiber. With acid-free 4 deckled edges,etc. Artist paper-Watercolor Pad SFZ007 A4 size 21x29.7cmSFZ008 A3 size 29.7x42cmPaper ... professional pressed surface,sutiable for different paintings,including watercolor,gouache,sketch,drawing,pastel,oil,acrylic,etc.*********************************************************************Please contact us for more information ...