Carbonless notebook is perfect for use in labs, science classes and more. The carbonless paper features both a white original sheet and blue copy sheet that are printed with a 4" x 4" graph layout. Detachable board divider can be easily positioned under the blue sheet to prevent bleed-through. Sets are consecutively numbered from 1 to 50 for quick reference. Front cover is made from durable, 20 point material to protect the interior pages from damage. The book is stapled and taped along the 8" side to securely keep each page in place.