Pressure Gauge,Oxygen Service Cleaned,2-1/2 In.,0 to 300 psi,Connection Size 1/4 In. NPT,Connection Location Lower,Smallest Graduation 5 psi,Graduations 50 psi,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