[Quality]: The marine clinometer features a double tube design to provide clear and accurate angle readings. [Wide Application]: This sailing clinometer is suitable for use on sailboats, fishing boats, yachts, and cargo ships, making it ideal for sailors, navigators, and marine enthusiasts. [Function]: The marine clinometer is designed for navigation, docking, and measuring vessel stability on water, serving as a reliable tool for nautical enthusiasts and marine maintenance personnel requiring inclination data. [Please Note]: The level gauge operates effectively at night and includes a night lighting double tube for enhanced visibility in low-light conditions. [Material]: This professional boat inclinometer is constructed from durable acrylic material, offering strength and wear resistance for long-term performance and reliability. Color: White Material: Acrylic Package Contents: 1 x High Precision Marine Inclinometer Note: The physical product may have slight color variations compared to the images, which does not affect functionality. Light reflection and display differences may cause the item color to appear slightly different in pictures. Measurement error allowance is +/- 1-3 cm.