* 5" PowerDamp Plus, High-Visibility Blue Dial with Extra Large White Numerals * Easily Installed, Fits 6 1/4" (15.88 cm) Mounting Hole. * Built-in Compensators to Easily Adjust for deviation * Scientifically Matched Sapphire Jewel & Hardened Steel Pivot Dial Movement * Internal Gimbal Systems for Maximum Stability During Adverse Pitch and Roll Conditions * Powerful DirectiveForce Magnets for Fast Heading Lock-on * Fixed Low Level Green NiteVu Night Illumination * 45 Degree Lubber Lines * High Temperature Construction for Extended Operating Range * Custom Fitted Protective Covers Available * 100% Repairable * Exclusive 5-Year Ritchie Warranty