Strathmore 300 sketchbooks are lightweight sketch paper pads with a fine-toothed surfaces suited for classroom experimentation, practice of techniques, or quick studies with any most dry media such as graphite and colored pencils, charcoal, sketching sticks. 50 lb. Acid-free. Micro-perforated sheets are actual size when removed at the perforation. 100 SHEETS. Top spiral-bound sketch pads are made in the USA.