Material: Copper filter material, finer filter and longer service life. Polymer material capacity cup, high strength heat resistance is not easy to aging, good sealing, waterproof, no air leakage. High quality: The filter can effectively remove impurities and debris in the compressed air to extend tool life and performance, High quality manufacturing process to ensure quality, 1/4 inch connection , with high quality brass gaskets, can be installed. Principle: The air filter regulator is the one that adjusts the main air pressure channel to a pressure value that control device requires after decompression filtration. Use to control pressure element and delay, overflow regulator. Efficient: Maintains stable outlet pressure regardless of operating pressure. inlet and flow fluctuations. If the outlet pressure is higher than the set pressure , pressure is released for stable output.