BookFactory Black Scientific Notebook / Scientific Lab Notebook - 168 Pages (.25" Ruled Format), 8 7/8" x 11 1/4", Black Cover, Smyth Sewn Hardbound (LIRPE-168-LLR-A-LKT21) Hardbound book with durably coated, black imitation leather cover and stamped with "SCIENTIFIC NOTEBOOK" Smyth sewn -- book lies flat when open, professionaly bound. Tamper-evident, archival quality, acid-free paper in 1/4" (6 mm) ruled format Page Dimensions: 8 7/8" x 11 1/4" Features a "User Data" page, a "Documentation Guidelines" page, and a "Table of Contents" page