SILENCER EXTENSION UOMS-3/8 TO FURTHER REDUCE THE LEVEL OF NOISE, UP TO FOUR SILENCER ELEMENTS CAN BE FITTED ON TOP OF ONE ANOTHER. TYPE OF SEAL ON SCREW-IN STUD=WITHOUT SEAL, ASSEMBLY POSITION=ANY, DESIGN STRUCTURE=OPEN SILENCER, OPERATING PRESSURE, VACUUM GENERATOR=0 - 8 BAR, CORROSION RESISTANCE CLASSIFICATION CRC=2 - MODERATE CORROSION STRESS