Works great with out Marshall or Accel Oil Pressure Gauges! Chrome plated to look good for years to come. Female threads for use with any 1/8" NPT Oil Pressure Gauge. Works with our Marshall and Accel Oil Pressure Gauges. Comes with an o-ring for a leak-free seal. Fits 1970 - Later Harley Big Twin, Shovelhead, and Evolution Motors (Replaces the top end feed screen plug on the engine block.) Also available for 1936 - 1969 models MADE IN THE USA ***GAUGE NOT INCLUDED*** Finish: Chrome Dimensions: Female Threads - 1/8" NPT Weight - 1.7 Ounce Fitment: Fits 1970 - Later Harley Big Twin, Shovelhead, and Evolution Motors (Replaces the top end feed screen plug on the engine block.)