... . OEM available 3. Customizable black steel case pressure meterCase:black steel (black painting steel, chrome plated steel, ABS)Ring:no (black steel, black painting steel, chrome plated steel)Window:acrylic (glass, acrylic ... :ASME B40.100 Grade B Kl2.5 for 1-1/2", 2", Kl1.6 for 2-1/2", 3.0", 4.0 ...