High Quality ThreadInlet end: 1/2" NPS male thread; Outlet end: 3/4" GHT male thread. The fittings are male thread, which are applicable models fitting for most items. Please check the size before ordering. You need to have the access to the inside of container to install the nut. Solid BrassThe metal parts of faucets spigot fittings are made of solid brass, which is strong and not easily corroded, suitable for long time use. Double Washers Double ProtectionTwo washers are respectively padded on both sides of the bulkhead to provide double protection. Better prevent leakage and make you more happy to use your rain bucket or something. Easy to UseFirst you need to drill a hole of appropriate size (about 3/4") for installation. Then pass the fitting through the bulkhead, pad the washers, tighten the nut. Finally also can connect the water pipe with appropriate size at the end. No doubt, it is easy to operate. Widely UsedThe bulkhead fittings can be applied in water towers, water inlet and outlet, and self-made water storage barrels, suitable for various pipes, faucets, hoses, fittings, multiple uses to provide convenience for your life.