BookFactory Black Engineering Notebook - 168 Pages (.25" Engineering Grid Format), 8" x 10", Engineering Lab Notebook, Black Cover, Smyth Sewn Hardbound (EPRIL-168-SGS-LKT4) Hardbound book with durably coated, black imitation leather cover and stamped with "ENGINEERING NOTEBOOK" Smyth sewn -- book lies flat when open, professionaly bound. Page Dimensions: 8" x 10", Tamper-evident, archival quality, acid-free paper in 1/4" (6 mm) grid format These books are also available on Amazon in red, green, blue, black or burgundy covers stamped with "ENGINEERING NOTEBOOK" BookFactory is a Veteran-Owned Firm. We Proudly Produce Our Books in Ohio, USA.