Hard-covered, 50-sheet case-bound books are excellent for permanently securing valuable notes and data. They have a thick, polyethylene cover, uncoated PolyPaper pages, and are completely waterproof and chemical resistant. Pages are numbered and include spaces for dates, signatures and any documentation needed for securing patent protection. Other pages have instructions for keeping research records, a table of contents, and there is a page for issuing the notebook. Page size: 9.25” x 11.25”.