[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 maritime enthusiasts. [Function]: The marine clinometer is designed for navigation, docking, and measuring vessel stability on water, serving as a reliable tool for ship operators, nautical enthusiasts, and marine maintenance personnel requiring precise inclination data. [Please Note]: The level gauge operates effectively at night and includes a night lighting double tube for added convenience. [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 package includes only the items listed above; other products are not included. Note: Due to light reflection and differences in display screens, the color of the item in the image may vary slightly from the actual product. Measurement error allowance is +/- 1-3 cm.