Service:Air and non-combustible, compatible gases.Wetted Materials:Aluminum, silicone, acrylic, polycarbonate, high carbon steel, low carbon steel, brass, paper, acrylic paint, enamel paint, alkyd coating, nickel plate, zinc plate, helsel FC, 300 series stainless steel, PTFE, Loctite® AV sealant, commercial black rubber, neoprene, samarium cobalt, nickel alloy steel cover, beryllium copper.Housing:Die cast aluminum case and bezel, with acrylic cover. Exterior finish is coated gray to withstand 168 hour salt spray corrosion test.Accuracy:±2.5% FS.Pressure Limits:-20″ Hg to 15 psig (-0.677 bar to 1.034 bar); MP option: 35 psig (2.41 bar). For applications with high cycle rate within gage total pressure rating, next higher rating is recommended.Overpressure:Relief plug opens at approximately 25 psig (1.72 kPa).Temperature Limits:20 to 140°F (-6.67 to 60°C).Size:4″ (101.6 mm) diameter dial face.Mounting Orientation:Diaphragm in vertical position. Consult factory for other position orientations.Process Connection:Female NPT of nominal line size. See Model Chart page.Weight:Gage only: 1 lb 2 oz (510 g), MP & HP 2 lb 2 oz (963 g); Venturi: see Model Chart page.