Includes a solid brass adapter and release valve, steel housing (100 psi) gauge, stainless steel springs, Viton O-rings, O-ring lubricant and nylon storage pouch Quickly diagnoses loss of power, poor fuel economy and hesitation and stalling Releases fuel through drain line with the push of a button Provides simple, fast and accurate fuel pressure checks Made in the U.S.A.. GAUGE FUEL PRESSURE100PSI