Holley offers two types of mechanical fuel pressure gauges: dry and liquid filled. The dry gauges are offered in 0-15 and 0-30 PSI increments and are budget priced but not short on quality. The liquid filled gauges are also offered in the 0-15 and 0-30 PSI ranges. They contain a liquid glycerin which dampens the needle movement and makes it m ore linear in operation. Liquid gauges are premium quality instruments which will give years of service. Product Features:1.5 in. DiameterChromed Steel Case0.125 in. NPT Brass FittingIncludes Elbow Fitting 1 1/2 in. DiameterFits Holley Chromed Fuel Lines and Fuel Block
