Detailed Product Description Vacuum Pressure GaugeDiameter: 1-1/2", 2", 2-1/2", 4"Case: black steel, stainless steelWindow: glass, CC.Bounden tube: brass, stainless steelConnection: brass or stainless steel Connection size: 1/4" 3/8" 1/2"NPT, BSP, BSPTPressure Range: 70mmhg-0(76CMHG-0)Accuracy: 3-2-3%Customers brands and logos accepted.