Liquid Filled Fuel Pressure Gauge 0-15 PSI Black Face

0-15 psi Fuel Pressure Gauge 1/8" NPT liquid filled, male 1/8" male NPT fitting on the back, 1 3/4" outside diameter WIll fit any fuel line or fitting with a 1/8" NPT female threadWhy liquid filled? The liquid absorbs vibration and pressure spikes. The dampening action of the liquid enables you to take readings during conditions of rapid dynamic loading and vibration. The liquid lubricates all moving elements, dramatically reducing wear in the movement.Can work with Holley / Barry Grant / C&S / APD / BLP / Rupert / AED / Pro Systems carbs