Durable hard cover provides increased writing stability.Twin-wire binding allows book to lie fflat when open.Includes self-sticking colored tabs/labels to customize index cover and spine.Microperforated pages.Global Product Type: Paper Pads/Note PadsNotebook.Pad Type: Notebook.Sheet Size: 11" x 8-1/2".Ruling: College/Margin.Number of Sheets per Pad: 100.Paper Color: White.Sheet Perforation: Microperforated.Paper Weight: 16 lbs.Binding Edge: Side.Punched/Unpunched: Unpunched.Ruling Color: Light Blue.Binding: Twin Wire.Lines Per Page: 25.Backing: Hard Cover.Cover Color: Black. Number of Compartments: 2.Height: 11". Width: 8-1/2".Post-Consumer Recycled Content Percent: 30 %.