3300 Series End Of Line Vacuum Relief Vent; ASME 150 Flange Connection; 12" Inlet Size; Carbon Steel Body, 316 SST Bolt-In Seat Ring; Fep-Tfe Pallet Diaphragm; 0.75 Oz/In2 And Above Vacuum Set Point; Standard Weight Material Steel Or Combination Of Steel And SST; Standard Bug Screen