AED offers some of the finest gauges available today at great pricing! AED gauges give accurate readings and long life. Liquid Filled gauges provide for additional shock resistance. All gauges are 1. 5" in diameter, chrome plated stainless steel, shock resistant, and can also be mounted on AED Fuel Lines. Gauges feature an 1/8" NPT male fitting.Pit Stop USA offers AED 1.5" Screw-In Fuel Pressure Gauge - 0-15 PSI - Liquid Filled 6101 at low everyday prices. Be sure to check out all of our products from AED - Advanced Engine Design including AED Fuel Line Pressure Gauges.