... Gauge,automoible gauge Vacuum pressure compound Gauge,Vacuum Gauge,vacuum pressure gauge,Vaccum and compund Gauge,automoible gaugeDiameter: 1-1/2", 2", 2-1 ... /2", 3", 4", 6"Case: plastic, steel, stainless steelWindow: acrylic, polycarbonateInternal: brass, stainless steelInlet thread: 1 ... /8", 1/4", 3/8", 1/2", NPT ,BSPT, ...