... B-1 silencer Pivoted and Plated the Nickel WhollyMaterial:Stainless SteelItem Code:SEB-B-1-6,SEB-B-1-8,SEB-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 ... in many large equipments, and be used for refuse the dusty,oil,air,and anyother materials ... noise is other function SEB-B-1 silencer Pivoted and Plated the Nickel Wholly