Laboratory notebook lets you effortlessly copy your notes on carbonless, numbered sets. Simply write on the first page of the set, and the special design automatically transfers a copy to the second page. Microperforations along the edges let you easily tear off the second sheets. Sheets are quad-ruled (4 x 4) for precise charting when necessary. Front is clearly labeled for easy identification. The 100 sheets are wirebound on the left side to secure pages and keep them in order. Pages are also protected with a pressboard cover.