Sierra white premier 3" tachometer. Sierra Part #62548P.
• For Diesel Magnetic Pickup (90-180 Teeth) applications
• Full automotive type lighting with no "halo" around dial edges
• When illuminated, black dial grads become red and pointer lights red
• White dial, black graduations/numerals (metrics in blue), red pointer staff
• Scratch-resistant curved glass lens with polished stainless steel near-flushed bezel
• U.S. and metric scales, with ISO symbols, where appropriate
• Fog-resistant design complies with SAE J-1810
• Dial Range: 0-4000 RPM
• Sender Code: Requires "B"