... -B-1-10,SEB-B-1-15,SEB-B-1-20,SEB-B-1-25Thread Size:1/8",1/4",3/8",1/2",3/4",1"Thread ... .Usually, this kind of products can be used on the equipments in order to reduce the noise and filtering the dusty or the air or oil ... be work with the equipments at the same time, to reduce the noise is other function SEB-B-1 silencer Pivoted and Plated the Nickel Wholly