Detailed Product Description Refrigeration manifold gaugeDiameter: 2-1/2"Case: steelWindow: acrylicInternal: brassInlet thread: 1/8", 1/4", 3/8", 1/2", NPT ,BSPT, BSPConnection: bottom connectionRange: 1~17kg/psi,0-35kg/cm2 or according to customer orderScale: psi, bar, Mpa, Kpa, kg/cm2, Hg single or dual scale or according to customers order.Accuracy: 2.5%, 1.6%