Sierra 58255P Amega Series 3" TachometerHottest selling black dial line! Amega Domed has clean-looking black dials with white and red graphics plus through-dial and perimeter lighting for great readability. Amega has been very popular, available in several styles since its debut in 1986.Features: Black dial, red graduations, white numerals, vivid white pointer staff.; Scratch resistant curved glass lenses, with black, near-flush bezels.; U.S. and Metric Scales, with ISO symbols, where appropriate.; Perimeter and thru-dial lighting.; A comprehensive array of outboard water pressure instrument kits.; Optional add-on square bezels for modular appearance.; Specifications: Dial Range: 0-7000 RPM; Size: 3"; Sender Code: O/B ALT./COIL; For:: O/B & 4-Stroke Gas Engines; 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;