| Intended for adverse service conditions Suitable for gaseous or liquid media that will not obstruct the pressure system Movement: Copper alloy Case: Stainless steel with vent plug Bourdon Tube: Copper alloy Pressure Connection: Copper alloy Window: Polycarbonate with Buna N Gasket Dial: White ABS (2" & 2 1/2"), White aluminum (4") Pointer: Black aluminum Accuracy: 2" & 2 1/2" ± 2 1/2% of span ASME B40.100 Grade A, 4" ± 1% of span ASME B40.100 Grade 1A | 