Our 2 pack of professional artist grade 9x12 spiral bound sketchbooks each feature 100 sheets of acid-free 65 lb / 100 gsm premium paper that has a decent tooth, won't allow ink to bleed and is perfect for pencils, charcoal, pastels, markers, pens and other dry media. Our sketch book 9x12 features perforated edges making each page easily detachable, a durable and sturdy backing that allows you to draw wherever you please and conveniently spiral bound pages that fully flip over and lay completely flat. We proudly stand behind the quality of all our products and strive to set ourselves apart by providing exceptional customer service. If you have any questions on the details of our products or how to use them, just reach out! We are here to help out our fellow crafters in any way we can.