Package contains: 4pcs metal cladding paper air compressor filters Product specification: The air compressor accessories are made of specialized heavy duty paper material with metal cladding, the inner diameter is 1.5" Easy to use: The portable size and weight can be used to replace the old or damaged piston air compressor filter, which can block dust, moisture and noise and improve the efficiency of the air compressor Wide application: This paper air compressor intake filter can be used in noisy equipment, such as blowers, air compressors, boilers, exhaust port, generators, pumps and exhaust ports, laboratories and operating rooms Air Compressor Intake Paper Filter Elements