This True Blue Level from Empire is built using their exclusive Advanced Concentric Molding (ACM) technology, which allows the most exacting tolerances possible, within 0.0005" per inch in all 10 level and plumb positions. Measuring 24" long, it has an anodized aluminum frame with milled edges for accuracy, dropped edges for added rigidity, and a strong magnetic holding edge for secure surface placement. Its blue fluid is easier to read than the traditional yellow. There is a top read window for clear, overhead viewing. Get it today and experience the True Blue Difference.