Sierra 65537P Argent Pro Series Diesel Alt Features: Size: 3″ Dial Range: 0-4000 RPM Red Thru-lit and halo illumination for clear night viewing Sender Code: O/B ALT./COIL Easy to read black graphics on a silver background Domed glass lenses are scratch resistant Low profile bezels, no “lip” to trap and hold water Fog-Resistant Design! Complies with SAE J-1810 Shop All Argent Pro Series