These shock-proof liquid filled gauges are vibration resistant to monitor your oil pressure with extreme accuracy! Rugged gauge case is constructed of stainless steel with brass internals. Silicone filled for vibration dampening with a durable acrylic lens. 1-3/4” Gauge Face (including bezel). 0-60 psi 1/8” NPT rear connection. Beautiful “Carbon Fiber” style gauge face with a polished Stainless Steel bezel. Comes with Chrome Adapter KIT (MADE IN THE USA) Fits 1970 - Later Harley Big Twin, Shovelhead, and Evolution Motors (Replaces the top end feed screen plug on the engine block.) These shock-proof liquid filled gauges are vibration resistant to monitor your oil pressure with extreme accuracy! Gauge: Rugged gauge case is constructed of stainless steel with brass internals. Silicone filled for vibration dampening with a durable acrylic lens. 1-3/4” Gauge Face (including bezel). 0-60 psi 1/8” NPT rear connection. Beautiful “Carbon Fiber” style gauge face with a polished Stainless Steel bezel. Also available with a machine “Turned” style face! Adapter Kit: Chrome plated to look good for years to come. Female 1/8" NPT threads. Works with our Marshall AND Accel Oil Pressure Gauges. MADE IN THE USA Fits 1970 - Later Harley Big Twin, Shovelhead, and Evolution Motors (Replaces the top end feed screen plug on the engine block.) Finish: Gauge Face – Carbon Fiber Style Polished Stainless Steel Bezel Dimensions: Gauge face (w/ bezel) - 1.75” Gauge Case - 1.6” Depth - 1” Fitment: Fits 1970 - Later Harley Big Twin, Shovelhead, and Evolution Motors (Replaces the top end feed screen plug on the engine block.)