... have no effect on bronze and brassType :KP-026 (Stardand Pressure Gauge)Dial size:1.5", 2", 2.5", 3, 3.5 ... ", 4", and 4.5", 6", 8", 10",Pressure range:-30" Hg-0-10,000PSISocket:Brass bottom and back ... ) U-clamp available5) Other connection sizes available upon request. STANDARD PRESSURE GAUGE