Create graphs, charts, and other detailed drawings with this quadrille-ruled composition notebook. Durable black cover keeps papers safe from rips, dirt, and water damage. The perfect binding allows book to lie flat when open, and for front cover to fold back for ease of writing. Includes index and self-adhesive tabs to keep notes organized. Vegetable oil based ink. Pocket-Sized Indicator: No; Book-Binding Type: Glued/Gummed; Book-Binding Details: Perfect Bound: Hard Cover; Book-Binding Edge: Side.