ART SPIRAL SERIES The Most Popular Sketch Book of Its Kind in the World! Available in your choice of black, blue or red cover. Considered the most useful sketch book ever created featuring Maruman's famous double spiral binding, laminated hardboard cover and backing, front label for identification of artist, subject matter and date range of works, and a tie for allowing stand-up presentation of works. The robust 80 lb. super-sized paper and lovely surface texture is excellent for all media. This series is highly recommended for all artists and for classroom use, allowing teachers to collect assignments easily and enjoy student desktop presentation of finished works. 24 sheets provide just enough pages for an artist series of works or ideas and/or a semester of assignments.