0-100 PSI Liquid Filled Fuel Pressure Gauge 

0-100 PSI 1-1/2" Moon Eye Gauge Liquid Filled

These 1-1/2" liquid filled fuel pressure gauges are perfect for monitoring fuel either at the carburetor, pump, or even fuel rail or fuel injected applications They use a specific liquid filling to help control needle bounce in high-vibration applications. 1/8" NPT Male thread.