Detailed Product Description Electric-contact Pressure gaugeDiameter: 4", 6"Case: steel, stainless steelWindow: plasticInternal: brass, phosphor bronze, stainless steelInlet thread: 3/8", 1/2", NPT, BSPT, BSPConnection: bottom connectionRange: 0~10000psiScale: psi, bar, Mpa, Kpa, kg/cm2, Hg single or dual scale or according to customers order.Accuracy: 2.5%, 1.6% 1%