Lab and Science Notebook, Quadrille Rule (5 sq in), Green Marble Cover, (60) 10.13 x 7.88 Sheets, 24/CartonKeep track of your lab work with this efficient, yet affordable, notebook. The sheets are center sewn for permanence, and the laminated, oversize covers protect the sheets from damage. Paper is smooth 15# white tablet, ruled in a 5 x 5 graph pattern. Keep track of your lab work with this efficient, yet affordable, notebook. The sheets are center sewn for permanence. Laminated, oversize covers protect the sheets from damage. Paper is smooth 15# white