Sierra/Prime Line 58255P Tach 7K, Amega 3"

Dial Range: 0-7000 RPM; Size: 3"; For: O/B & 4-Stroke Gas Engines, Black dial, red graduations, white numerals, vivid white pointer staff; Scratch resistant curved glass lens with black near-flush bezels; Perimeter and thru-dial lighting, 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: IP 65; Bezel O.D.: 3.78, Housing O.D.: 3.39; Hole Size: 3.43.