' Vacuum Gauge, Liquid Filled, 2 In., 30 In. Hg Vac to 0, 100 kPa Vac to 0, Connection Size 1/4 In. NPT, Connection Location Lower, Smallest Graduation 1 In. Hg, Accuracy +/-3-2-3 Percent, Case Material 304 Stainless Steel, Case Color Silver, Socket Material 316 Stainless Steel, Tube Material 316 Stainless Steel, Filled With Glycerin, Lens Material Acrylic, Ring Material Crimped Stainless Steel, Operating Temp. Range -40 Degrees to 140 Degrees F '