US Art Supply 9 in. x 12 in. Premium Black Heavyweight Paper Spiral Bound Sketch Pad, 140gsm, 64 Pound, 30 Sheets (Pack of 2 Pads) Acid Free, Neutral pH, Spiral Bound Black Heavyweight Sheets Create cool effects using gel pens, metallic pencils, oil pastels & more 30 Sheets - 64lb (140gsm) Pack of 2 Pads