Wirebound Engineering Notebook, 20 lb Bond Paper Stock, Green Cover, (80) 11 x 8.5 Sheets, 24/CartonPart of the Signature Collection, these Engineering Notebooks are covered and spiral bound for durability. Heavyweight paper reduces bleed. The 20 lb paper features a frame front with a 0. 5" margin and a 5 x 5 enclosed grid on the back for precise sketches, record keeping and notes. Each notebook contains an oversized double pocket under the cover for storing loose paper. Perforated, 8. 5" x 11" sheets and cover are three hole punched along the 11"