This A5 Seawhite Concertina Sketchbook is a unique and versatile book for display and the application of a variety of media.With 70 pages (35 continuous sides) of 140gsm cartridge paper with two sheets joined together for stability, there are no fewer than 70 possible working surfaces for experimenting with an assortment of media.Made in the UK, this sketchbook comes in a hard carry case for additional protection.. A5. Versatile book for display and a variety of media. 70 Pages / 35 continuous sides . 140gsm cartridge paper x2 for extra stability. Comes in hard carrying case. Made in the UK. Approximate dimensions (mm) H218 W150 D30. Weight 500g