About This Material: It can apply to water, oil and fuel, LP and natural gas, and be used to connect various pipes as well as air tools. Coupling for connecting two pipes of different diameters into a straight pipe. Function: 1/2" x 3/8" NPT Female threads Hex Coupling for connecting two male threaded pipes of different diameters. Or Extending the pipe length. Hard-connected, it does not need extra sealing for most situation,NPT thread size does not actual diameter, it is only nominal pipe size. Operating temperatures range from -53 to 121℃ (-65 to 250 ℉). Operating pressure: 150 PSI. Application: Apply to home plumbing pipes, grease, fuels, natural gas, refrigeration, instrumentation, hydraulic and other applications. Package Includes : 5 Pcs Overview Size : 1/2" FNPT x 3/8" FNPT Material : Metal Brand : CDQBWKJGFJ Connector Type : Reducer Thread Size : 1/2 Thread Type : NPT Item Weight : 0.18 Kilograms Number of Pieces : 5 Manufacturer : CDQBWKJ