Emil Kozak for Miquelrius Notebook, Geology Black (6.5" x 8", 4-Subject, College Ruled) Medium 4-Subject notebook; 280 pages (70 in each color subsection of blue, red, grey, green) Extra opaque 70gr/m2 paper; college ruled; header for titles Micoperforated pages for easy detachment; hole-punched for filing Card covered with printed paper laminated in plastic Coil binding which allows the notebook to be opened flat and to make 180 degree turn