Drum Vent End of Drum Bung Body Material Stainless Steel Color Gray For Drum Orientation Horizontal For Liquid Type Petroleum For Plug Size 2 in Includes Flame Arrestor Yes Minimum Opening Pressure 3 psi Overall Height 2 in Overall Width 5 in Pipe Size 2 in Thread Gender Male Thread Type NPS NPT Vent Type Pressure Vacuum Relief Vent Includes Brass Cap with Safety Chain Model No 08211 9 in (229 mm) Wide Polyethylene Funnel Maximum Opening Pressure 8 psi