B type exhaust muffler . Mainly used for reduce the noise, and refuse the dusty,oil,air or anyother materials . A Type Exhaust muffler Material:Bronze Item Code:A-6,A-8,A-10,A-15,A-20,A-25 Thread Size:1/8",1/4",3/8",1/2",3/4",1" Thread Kind:BSPP,BSPT,NPT Color:Nature Normal Package:Plastic Bag Usually, this kind of products can be used on the equipments in order to reduce the noise and filtering ...