Drum Safety Vent Body Material Brass Color Bronze For Drum Orientation Horizontal For Liquid Type Flammable and Non-Flammable Solutions For Plug Size 2 in Includes Flame Arrestor Yes Minimum Opening Pressure 5 psi Overall Height 3.5 in Overall Width 3.25 in Pipe Size 2 in Thread Gender Male Thread Type NPT Vent Type Pressure Vacuum Relief Vent For Drum Capacity 30 gal 55 gal Maximum Opening Pressure 8 psi Overall Length 3 in Standards FM Approved