What you get: you will receive 6 pieces / separators, the blue end (concave) is the "outer" side of the airflow and the connector side (convex) is the airflow inlet, are easy to install and ergonomic for your convenience and ease of use General import export: universal standard male and female 1/4 inch NPT inlet and outlet designs make it easy to connect air lines to air tools and airbrush to accommodate most air tools for convenience Sturdy material: the / separator is made of polycarbonate housing, aluminum valve body and brass fittings, it has good anti-oxidation performance, which greatly improves the durability and reliability of the tool and extends its service life Extend tool life: clean air is essential in pneumatics, filter can not only be used as an air separator for air compressors, but also effectively trap and dust, so that only clean air can lead to pneumatic tools; Greatly reduces the disposal of worn airbrushes and other pneumatic tools, thus extending the service