Canson Foundation Series Paper Sketch Pad for Pencil or Pen, Micro-Perforated Sheets, Top Wire Bound, 50 Pound, 9 x 12 Inch, 50 Sheets Smooth surface, acid free paper that erases cleanly Suitable for pencil and pen Double wire binding for durability 50 sheets of 50 pound/74g Acid free 9 x 12 inch paper