Duratech Bilingual Level Book – 4½″ x 7¼″ Duratech Bilingual Level Books are durable, reliable field notebooks designed for accurate documentation in surveying, engineering, and construction applications. With a sturdy hard cover and stitched binding, this book withstands demanding jobsite conditions while keeping measurements and observations organized. Designed for field use, this level book makes it easy to record leveling notes, measurement data, and calibration information for levels and lasers. The included appendix provides useful reference tables, making it ideal for surveyors, engineers, and construction professionals on a variety of projects. Key Features • 4½″ x 7¼″ size – portable, field-ready format • Stitched binding with extra-stiff hard cover for durability in outdoor use • Ruled light blue pages with red vertical lines for clear, organized note-taking • Includes appendix with conversion tables and field calibration reference