Marshall 60 psi Oil Pressure Gauge - Shock Proof and Liquid Filled - 1/8" NPT Fitting - Machine "Turned" Gauge Face - Bobber Chopper Cafe Racer Rugged gauge case is constructed of stainless steel with brass internals. Silicone filled for vibration dampening with a durable acrylic lens. Beautiful Machined/Turned style gauge face with polished Stainless Steel bezel. 0-60 psi 1/8 NPT rear connection.