Duksbak WL-7 Waterproof Notebook (4.5" x 7") – Level Pattern The Duksbak WL-7 Waterproof Notebook is purpose-built for elevation tracking and grading workflows in the field. Featuring the Level pattern , it provides a structured format for recording benchmarks, elevations, and differential measurements with clarity and consistency. Engineered with Duksbak waterproof paper , the WL-7 protects critical data from moisture, dirt, and long-term exposure to harsh conditions. The durable poly cover and coil-bound construction ensure reliable performance and ease of use in the field, while the compact format supports efficient daily carry. With 50 waterproof sheets , it is a dependable tool for surveyors and construction professionals. Key Features Level pattern pages for elevation and grading workflows Waterproof sheets for reliable use in wet environments 4.5" x 7" field format for portability Durable poly cover for jobsite protection Coil-bound spiral binding for flat, efficient use 50 sheets (100 pages) for extended fieldwork Ideal for surveying, grading, and construction applications