This is a 1/4" brass small ball valve. Ball valves use a spherical disc to control flow between pipes, tubes or hoses. Do not over-tighten. Male and female NPT thread, handle plastic coated lever, easy operation. Can be used to give your tool full airflow for total shutdown. Designed for use on all pneumatic circuits and features a positive quick connect/disconnect seal. Widely used in irrigation, pipeline, oil and gas supply. Working medium: natural gas, liquefied petroleum gas., Weight: 0.51588169308 Pounds, Manufacturer: Rtxbvg