This A3 Daler Rowney A Series Spiral Sketch Pad is ideal for a variety of dry techniques and pen work.With 25 sheets of acid-free 150gsm smooth paper, this spiral bound sketch pad is FSC certified, has been internally sized with synthetic sizing and is free of optical brightening agents.. A3. 150gsm smooth paper. 25 sheets. Ideal for a variety of dry techniques and pen work . Acid free. Internally sized with synthetic sizing. Free of optical brightening agents. FSC certified. Spiral bound. Approximate dimensions (mm) H433 W297 D16. Weight 616g