. Sierra Part #65692P.• White dial, black numerals, black pointer with fire-orange tip• Scratch resistant curved glass lenses, with polished stainless steel, near-flush bezels• White perimeter and red thru-dial lighting• Dial Range: 0-4000 RPM• Tachometer/Hourmeters (Electric): Diesel Magnetic Pickup, 90-180 Teeth• Sender Code: Requires "B"• Diameter: 3.78"• Hole size: 3.41" min/3.44" max Excellent readability at night | 3" Tachometer/Hourmeter in Red