Diameter: 11/2" ,2", 21/2", 3", 4"Case: 304, 316 stainless steelWindow: polycarbonateInternal: stainless steel, brassConnection: bottom connection, center back male connectionRange: 0～15psi, ??0～7000psiScale: psi, bar, Mpa, Kpa, kg/cm2, Hg single or dual scale or according to customers order.Accuracy: 1.6%, 1%Inlet thread: 1/8", 1/2", 1/4", NPT BSPT, BSP