TOPS Engineering Computation Pads are the starting point for professional diagrams and plans. Stock up and save with our economy pack with three 100-sheet notebooks per pack. 5 x 5 Cross-section rulings on back show through clearly to provide scale and structure. Margin lines and heading bars on front provide standardized formatting on every page. Each glue-topped, 3-hole punched pad features low-glare green tinted paper to help reduce eye strain and fatigue. A never-out necessity for architects, designers, engineers and their students. TOPS Engineering Pads earn high marks for usability. Our sheer, high quality engineering paper is smooth and durable. Holds up to intense pencil and ink work. Flawless standardized margins mean your margin lines won't wander from sheet to sheet. Every line and heading bar aligns from page to page to meet standard specifications. Sheets have gridlines you can see clearly from the back side of the page. Vivid 5 x 5 cross section rulings help you graph equations, diagrams and schematics. Provides the perfect drawing surface. Printed on green tint paper to help reduce eye strain during late nights at the drafting table. Unlike some bargain brands, TOPS computation sheets are padded and punched for convenience. Each pad has a firm back board for writing support and is 3-hole punched to fit standard ring binders,