Plastic Filter Muffler: 4pcs 16mm 3/8 PT Muffler which allows airflow through the muffler, but prevents or reduces the spread of audio device, a great option to reduce noise from your compressor. Efficient Design: The muffler adopts the principle of atomization and resistance, and a two-layer design of the biological damper in the body for better noise reduction. Easy to Use: The muffler comes with 3/8" thread, fits most compressors, easy to install and use. It is also a good tool to replace your old ones. Extend Service Life: This external thread air intake muffler is made of premium and durable material. The compressor replacement parts significantly help to improve the efficiency of the air compressor and durability. Compressor Air Filter: Suitable for oil-free air compressor, it can be used in noisy devices such as fans, air compressors, boilers, exhaust systems, generators, pumps and exhaust fittings. Ideal accessory for air compressors.