LM type series aluminous auto muffler,Mainly used in more bad ... Series Aluminous auto MufflerMaterial:Stainless SteelItem Code:LM-6,LM-8,LM-10,LM-15,LM-20,LM-25Thread Size:1/8",1/4",3/8 ... want some of them be nipple or zinc plated, that's OK,Our products mainly used in many large equipments, and ... the same time, to reduce the noise is other function LM Type Series Aluminous auto Muffler