Material : Aluminum Alloy. Rust-proof aluminum housing and brass fittings provide additional tool durability. Working Pressure：WorkMax operating air pressure is 150 psi（1.03mPA） Size : Universal 1/4" NPT Inlet and Outlet Thread. Can be connected with spray paint gun, air line fitting, pneumatic tools. Eliminate water, oil, moisture, dust and particulates in the spray gun filter, air compressor line, ensure the dry gas, effectively extend the life of the air tool. Easy to clean:Press the release valve to eject all the waste which was trapped inside Clean air is essential in pneumatics, this inline air filter can not only be applied as a water oil separator for air compressors, but also effectively trap oil and dust, so only clean air can lead to pneumatic tools; Greatly reduce the disposal of worn airbrush and other pneumatic tools, effectively extending the life of pneumatic tools