... . 3.size:6" mini. 4.need less room. 6" efficient duct Muffler1.uses,reduce the noise of the device.2.easy ... the important measures. Muffler is installed on the air power equipment (such as fan, air compressor, boiler vent, generators, water pumps and ... , to create a good working environment 2.ues for air power equipment (fan, air compressor, boiler vent, generators, water pumps and other ...