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 the control device requires after decompression filtration.Use to control the pressure element and the delay, overflow regulator . Effective: Maintains stable outlet pressure regardless of inlet pressure and flow fluctuations. If the outlet pressure is higher than the set pressure, pressure is released for stable outlet. Number of pieces delivered: 1 lucky meet Note: The data is all manually measured, please allow 1-3cm error, due to the difference in light and display, there will be some difference of color, the actual object received shall prevail.