This book is ideal for use in labs and science classes. The smooth 20 lb green writing paper is printed with 4 square/inch graph layout. The pages are consecutively numbered from 1 to 152. The covers are made from a flexible red 10 pt pressboard. The book is glued and taped along the side; sheets are not designed for removal from the book. Pocket Sized Indicator: N; Book-Binding Type: Glued; Taped; Book-Binding Edge: Side; Cover Color: Red.