Our recycled, heavyweight sketch is a hard, clean, natural white 70-Pound (114 grams per square meter) sheet with excellent erasing qualities. Elemental chlorine free sheet has 30-Percent post consumer waste recycled fiber and meets the U.S. government standards for a recycled sheet. Pads are double wire, side binding and micro-perfed for easy sheet removal. For use with all dry media. 50 sheets per spiral bound pad.