Helps greatly improve air filter efficiency and longevity. Suitable for oil-free air filter. Widely used on air filters intake port, can greatly reduce air intake noise. Accessories great for air filters, fairly easy to install. This is a great option for reducing noise from your compressor and is a great option for replacement. Ideal accessory for air compressors, quite easy to install. Widely used on the inlet port of air compressors, can greatly reduce air intake noise. > Features: 1. Used for air compressor inlet, can effectively lock the dust in the air humidity. 2. Able to reduce compressor noise at work. 3. Greatly helps to improve air compressor efficiency and longevity. Suitable for oil-free air compressor Features: Used for filtration. Compatible: For oil-free air compressor Thread type: G1 or 2. Contents: 1 air filter.