SKILCRAFT® - NSN2866952 Spiral-bound memorandum book contains 50 sheets of white, 15 lb. basis weight paper. Each sheet offers narrow ruling 1/4" apart on both sides. Design also features a Pressboard back. Elemental chlorine-free (ECF) paper is made using 37 percent post-consumer material and 38 percent total recycled material measured by total weight and meets Executive Orders 13514 and 13423.