The Rite in the Rain All-Weather Spiral Level Notebook is a weatherproof notebook with 1/4" rules and vertical columns. The level pattern on the pages make it the best option for recording engineering, mining, forestry, marine, and construction field notes. The sturdy Rite in the Rain paper of this notebook will not tear, expand or turn to mush when written on while exposed to the elements. The combination of the Polydura cover, water-resistant pages, and rust resistant Wire-O side binding ensures field notes are intact and readable back at the office. This 7" x 4.875" notebook weighs only .2 lbs and has 64 pages/ 32 sheets. Imperial and metric ruler guides are on the cover if needed. The Rite in the Rain All-Weather Spiral Level Notebook may be written on using markers, ball-point pens, mechanical pencils, wax crayons, and Rite in the Rain pens.