. Sierra Part #62724P. Features:• Full automotive type lighting, no "halo" around dial edges• When lit, white dial grads become red, pointer lights white• Black dial, white graduations/numerals (metrics in blue), white pointer staff• Scratch-resistant curved glass lenses with black, near-flush bezels• Fog-resistant design• Complies with SAE J-1810• Dial Range: 0-6000 RPM• Tachometers (Electric): O/B & 4-Stroke Gas Engines• Tachometer: Mariner 30 & 40 HP (2 cylinder) engines require a module (Mercury P/N 17461A2)• Sender Code: O/B ALT./COIL• Voltage: 12V DC• Current Draw: 0.10 - 0.15 A• Operating Temperature: -40C to +70C• Ingress Protection: IP65• Bezel O.D.: 3.78"• Housing O.D.: 3.39"• Hole Size: 3.43" 0-6000 RPM dial range Fog and scratch-resistant design | Premier Pro 3" Tachometer in White