3300 SERIES END OF LINE VACUUM RELIEF VENT STANDARD CONSTRUCTION; 2" LINE SIZE, MATES WITH STANDARD ASME 150# FLANGED CONNECTION; FLAT FACE ALUMINUM BODY & COVER, ALUMINUM TRIM WITH BUG SCREEN; FEP-TFE PALLET DIAPHRAGM; STANDARD WEIGHT MATERIAL STEEL OR COMBINATION OF STEEL AND SST;