... . Mainly used for reduce the noise, and refuse the dusty,oil,air or anyother materials . A Type Exhaust muffler Material:Bronze ... ,A-8,A-10,A-15,A-20,A-25 Thread Size:1/8",1/4",3/8",1/2",3/4 ... the air or oil or water and so on.by the way, our product has three kinds of thread including BSPP(G ... many large equipments, and be used for refuse the dusty,oil,air,and anyother materials which can't be work with ...