NATIONAL Computation Notebook, 4 X 4 Quad, Gray, Cover, 11 x 9.25", 50 Sets (43645) Go to amazon.com Related posts Best engineering pad cover for 2022 FeatureData pad100 sheetsLamyFront side 5 x 5 quad, back plain3-hole punchedGray pressboard cover50, 4x4 quad carbonless numbered setsWhite and yellow paper DescriptionSecond sheet is micro-perforated