Package Content: You will receive 4 pieces of air compressor filters with a 3/8 thread diameter of 16 mm. The black all-metal material is not easy to damage and lasts longer. 【Noise Reduction】The air compressor silencer is used on the air compressor inlet, which can effectively block dust in moisture and reduce noise. It is an ideal choice for compressor accessories. 【Extend Service Life】 Use the silent air compressor to improve the efficiency of the air compressor and longevity. 【Easy to Install】 The air compressor uses a standard 3/8 thread. You just need to screw it into the device. Installation is quick and easy. Wide Application: The silencer filter is suitable for oil-free air compressor and can also be used in noisy devices such as fans, air compressors, boilers, exhaust systems, generators, pumps and exhaust fittings. It can reduce the noise during compressor operation.