Detailed Product Description liquid filled pressure gaugeDiameter: 1-1/2", 2", 2-1/2", 3", 4", 6"Case: 304 stainless steel Window: polycarbonateInternal: brass, stainless steel Inlet thread: 1/8", 1/4", 3/8", 1/2", NPT ,BSPT, BSPConnection: bottom connectionRange: 0~10000psicale: psi, bar, Mpa, Kpa, kg/cm2, Hg single or dual scale or according to customers order.Oil composing: glycerine, ...