Gauge, Pressure, 2-1/2 In., 30 In. Hg Vac/kPa, Accuracy +/-3-2-3 Percent, Case Material Steel, Case Color Black, Socket Material Brass, Tube Material Lead Free Phosphor Bronze, Lens Material Polycarbonate, Ring Material Chrome Plated Steel, Operating Temp. Range -40 Degrees to 150 Degrees F, Characteristics Lead Free Wetted Parts, Friction Bezel Ring, Black Steel Case, CRN Registered