Aerovent Drum Vent for 3/4 in Bung Body Material Brass Color White For Drum Orientation Vertical For Liquid Type Non-Corrosive Flammables For Plug Size 3/4 in Includes Flame Arrestor Yes Minimum Opening Pressure 3 psi Overall Height 20 in Overall Width 7 in Pipe Size 3/4 in Thread Gender Male Thread Type NPS NPT Vent Type Pressure Vacuum Relief Vent Includes Extra Replacement Filter Filter Maximum Opening Pressure 8 psi