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Permanently bound, hardcover, ruled books feature a design ideal for laboratory record-keeping. Section thread sewn books lie flatter when open and pages will not come apart. Premium white, acid-free paper with place marker ribbon. Black Fabrihide covers with red corners and spine. Waterproof and permanent inks. Numbered pages. Notebook includes table of contents, identification page, printed date, signature and witness section on each page, and instructions on how to keep accurate, legal records. 37 lines per page.