The OEM Tops Engineering Computation Pad features a five-square-per-inch, cross-section ruling printed on the back that faintly shows through to the front. The front is printed with frame margins, making diagramming easier. This three-hole punched pad is gluebound and designed to fit in three-ring binders. The eye-ease green tint paper reduces glare and eye strain, providing a comfortable writing experience. Each letter-size computation pad contains 50 sheets of 16 lb. paper and has a 27 point chipboard back for added support.