3300 Series Rev C Vacuum Relief Vent End-Of-Line; Mates With PN16 Flange Connection; 6" Inlet Size; Derakane 470 Body And Integral Seat Ring With 316 Stainless Steel Studs; FEP Seal Material; 0.75 - 7.99 Oz/In2 Vacuum Pallet Configuration; FRP Encapsulated Carbon Steel Weight Material; Standard Vacuum Protection Screen; Standard Cleaning Method