Model 2199 Rev A Thief/Gauge Hatch; Mates With ASME 150 Flat Face Flange; Anodized Blue Aluminum Construction; 8" Line Size; With Weatherhood; Fluorocarbon Elastomer (FKM) O-Ring; 4 Oz/In2 Pressure Set Point; Pressure/Vacuum Relief With 0.4 oz/in2 Vacuum Setting