Sierra 59737P Lido 3" 7000RPM TachometerFeatures: Dial Range: 0-7000 RPM; Size: 3"; Tachometers (Electric): O/B & 4-Stroke Gas Engines; Sender Code: O/B ALT./COIL; White dial, black numerals, black pointer with fire-orange tip; Scratch resistant curved glass lenses, with polished stainless steel, near-flush bezels; Optional add-on eyebrow or square bezels available (see Gauge Accessories for details); White perimeter and red thru-dial lighting; Fog-Resistant Design! Complies with SAE J-1810; Tachometer: Mariner 30 & 40 HP (2-cylinder) engines require a module (Mercury P/N 17461A2); Voltage: 12 VDC; Current Draw: 0.10 - 0.15 A; Operating Temperature: -40C to +70C; Ingress Protection: IP65; Bezel O.D.: 3.74; Housing O.D.: 3.39; Hole Size: 3.43;