D0992 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 Percent Case Material 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 Characteristics PLUS Performance Series 1009 Manufacturers Warranty Length 5 yr.