Features: Compatibility: Scale map is suitable for USNG, or other base coordinate systems. Scale: Coordinate scale protractors is widely used by navigators to mark the map being measure, for 1:25,000, 1:50,000, 1:100,000, 1:250,000 map. Easy to read: map scale is easy to read. Clear coordinate scale is make of quality plastic, wear resistant, long service life. Wide ranges of application: suitable for land, sea navigation or other adventure activity. Specifications: Component: Plastic Size: Approx. 127x127mm/5x5in Thickness: 1.2mm Package Includes: 1pc Map Scale note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color. Compatibility: Scale map is suitable for USNG, or other base coordinate systems. Scale: Coordinate scale protractors is widely used by navigators to mark the map being measure, for 1:25,000, 1:50,000, 1:100,000, 1:250,000 map. Easy to read: map scale is easy to read. Clear coordinate scale is make of quality plastic, wear resistant, long service life. Wide ranges of application: suitable for land, sea navigation or other adventure activity.