【Size】3/8" female x 1/2" male thread. The fitting's OD is approx 27/32"/20.5mm. The thread is NPS, have no tapered. It's straight thread. | 【Quality Material】Made of soild brass,make it strong construction for prolonged service life.Won’t be easily corroded.Lead Free Compliant is not 100% lead free. Contains Less Than 0.25% Lead. | 【Easy to install】Using thread linking to make connection more firmly. Come with rubber gasket, provides strong seal without slipping, reliably sealing. | 【Widely Applications】Commonly used in water towers, water inlet and outlet and self-made water storage barrels,rain barrels, also can be used for various pipes, faucets, hoses, fittings, etc. | 【Note】The thread size on the title is not the fitting's diameter, please check the size you need before ordering.Due to manual measurement, please allow a deviation of 1 - 2mm.