Detailed Product Description Freon GaugeCase: stainless steelWindow: polycarbonate Internal: brass, stainless steelInlet thread: 1/8", 1/4", 3/8", 1/2", NPT ,BSPT, BSPConnection: center back male 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%