All Ritchie compasses are built with ultra lightweight dial assemblies. Therefore, we don&';t need to use heavy fluid to artificially dampen the movement. Our compasses are filled with a highly refined, very low-viscosity dampening fluid which allows the dial to move smoothly within the bowl and lock on to magnetic north faster than other compasses. Ritchie&';s Dampening Fluid is also refined for brilliant, optical clarity. Ideal for Runabouts, Center Consoles, Ski Boats, Flats Boats, Bass Boats, Cars, Trucks, RV&';s and ATV&';s 2 1/4" Direct Reading Dial with Large Numerals for Easy Reading Black with Black Dial, Bracket Mounted Strong Directive Force Magnets and Composite Dial for Fast Performance Built-in Compensators to Correct for Deviation Extra Large Diaphragm and Rugged Construction Provide Extended Operating Temperature Range High-Impact Rubber Accent Strip Built-in, 12-Volt Green NiteVu Lighting 100% Repairable Exclusive 5-Year Ritchie Warranty