Pro-Art (105-971 400 Series Watercolor Artist Tiles, Cold Press, 4"X4", 10 Sheets These Artist Tiles by Strathmore were specifically developed to be used for the popular creative meditative drawing exercise popular now Made out of Strathmore's 400 Series Watercolor paper; the tile is format appropriate for pattern drawing and creating inspiring art with wet media Pack contains 10 tiles of 140lb; acid free; heavy weight paper