1Thick design, 60 sheets of paper, total thickness up to 20.8in. The cardboard cover can be used as a drawing board. 2Inner pages use 140g professional sketching paper, easy to write, not easy to fuzz after repeated scratches. 3Thread coil binding, flexible page turning, each page can be rotated 180, convenient for using. 4The paper is preset with cutting lines, which can be easily torn as needed without affecting the binding and other papers. 5Lightweight and portable, easy to carry when going out, suitable for sketching, color lead illustration, design, etc.