Keep track of your lab work with this exceptional quality lab notebook.Oversize pages are produced from extra-heavy 24# buff bond paper, and are printed with a 4x4 graph print.The sheets are section sewn, which allows for extra "lay-flat" when taking notes in the lab.Covers are water-resistant 20pt red Genuine Pressboard.Pages are sequentially numbered 1-152.Proudly made in USA!