Strathmore 400 recycled paper sketchbooks. Strathmore's most popular sketch pads feature heavyweight 60 lb., fine-toothed surface sketch paper is ideal for experimentation, perfecting techniques and preliminary drawing. Contains 30% post-consumer fiber. Great for most dry media such as graphite and colored pencils, charcoal, sketching sticks, soft and oil pastels. Acid-free. Made in the USA. Spiral wire bound sketchbooks with 100 sheets (18x24 size has 30 sheets).