HF-743W - Helmsman  Features: * 3 3/4″ (95 mm) Open Face Dial or CombiDial * Easily Installed, Fits 4″ (102 mm) Mounting Hole * Exclusive Built-in Green NiteVu Night Illumination * Built-in Compensators to Easily Adjust for Deviation * Scientifically Matched Sapphire Jewel and Hardened Steel Pivot Dial Movement * Powerful DirectiveForce Magnets for Fast Heading Lock-on * Movable Sun Shield * 45 Degree Lubber Lines * High Temperature Composite Construction for Extended Operating Range * Adapter Rings Available. Sold separately. 6″ (153 mm) * 100% Repairable * Exclusive 5-Year Ritchie Warranty Approx. Shipping Weight: 2lbs (907g) Notes: All magnetic compasses come standard with 12v lighting. 24 & 32v lighting options are available. Some custom built OEM models may have different lighting.