Duratech Bilingual Field Book – 4½″ x 7¼″ Duratech Bilingual Field Books are durable, reliable notebooks built to capture field observations, sketches, and measurements with clarity and efficiency. Bound in a high-quality cover with stitched binding and extra-stiff hard cover, these books are designed to handle the rigors of outdoor fieldwork. Perfect for surveyors, engineers, and construction crews, this field book is ideal for recording notes, sketches, and measurement data on-site. The appendix provides handy reference tables and calibration guidance for levels and lasers, ensuring accurate and reliable documentation in any field environment. Key Features • 4½″ x 7¼″ size – portable, easy-to-carry format • Stitched binding with extra-stiff hard cover for maximum durability • Ruled light blue pages with red vertical lines for neat, legible entries • Includes appendix with useful conversion tables and calibration instructions