Maruman Mnemosyne Special Memo Notepad - B5 (6.9" X 9.8") - 7 mm Rule Divisions - 30 Lines X 80 Sheets B5 size, 30 lines, 80 sheets, special memory-filled 7mm Kay, enters cut perforations, writing paper 80G / m (MPS800) adopted, cover material (PP), twin-wire binding.