The Sierra Eclipse Tachometer features smart white and blue graphics on a black dial background. The very low profile bezel follows the curve of the lens to eliminate water trapping. This Eclipse Tachometer is designed with domed glass that sheds water and resists scratching. Perimeter lighting provides excellent readability at night.• White and blue graphics on a black dial background• Low-profile bezel• Scratch-resistant domed glass lens• Perimeter lighting• Diesel Alternator• Dial Range: 0-4000 RPM• Requires 3-3/8" diameter mounting hole Scratch-resistant domed glass lens Low-profile bezel | Eclipse 3" Tachometer For Diesel Alternator in Blue