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, Festo