Detailed Product Description Pressure gauges with "U" clamp:Diameter: 2", 2-1/2", 4"Case:stainless steel Windows: polycarbonate lens Bounden tube: brass or stainless steel Connection: brass or stainless steel Connection size: 1/4" 3/8" 1/2"NPT, BSP, BSPTPressure Range: 0-30Psi-10000PsiAccuracy: 3-2-3%Customers brands and logos accepted.