Made in USA - Proudly produced in Ohio by a Veteran-owned business Hardbound book with durably coated, black imitation leather cover and stamped with "LABORATORY NOTEBOOK" Section sewn -- book lies flat when open, professionally bound. Square Binding Tamper-evident, archival quality, acid-free paper in 1/4" (6 mm) grid format Page Dimensions: 8 7/8" x 11 1/4" Reorder SKU: EPRIL-096-LGS-A-LKT1 These laboratory notebooks are less expensive than hardback books yet are tamper-evident and durable in lab environments. In fact, these are the same books used by some of the most innovative companies and research institutions in the world. With sequentially numbered pages and researcher and witness signature and date blocks, these books are exceptionally reliable and easy to use.