' Vacuum Gauge, Oxygen Service Cleaned, 2-1/2 In., 30 In. Hg Vac to 0, Connection Size 1/4 In. NPT, Connection Location Lower, Smallest Graduation 0.5 In. Hg, Accuracy +/-1.0 Percent, Case Material 304 Stainless Steel, Case Color Silver, Socket Material 316 Stainless Steel, Tube Material 316 Stainless Steel, Lens Material Polycarbonate, Ring Material Stainless Steel, Operating Temp. Range -40 Degrees to 150 Degrees F, Series 1009, Manufacturers Warranty Length 5 yr. '