Emil Kozak for Miquelrius Notebook, Geology Black (8.5" x 11", 4-Subject, College Ruled) Large 4-Subject notebook; 280 pages (70 in each color subsection of blue, red, grey, green) Recycled extra opaque 80gr/m2 paper; college ruled; header for titles Micoperforated pages for easy detachment; hole-punched for filing Opaque polypropylene cover; Made in Spain Coil binding which allows the notebook to be opened flat and to make 180 degree turn