This stainless 1/2 in. coupling is perfect for homebrewers using Speidel plastic fermenters. You can use it when you want to change the spigot or airlock on your fermenter. It has a 1/2 in. MPT on the outside and a 1/2 in. FPT on the inside, allowing you to attach different components easily. It comes with a standard Speidel lock ring and gasket, ensuring a reliable connection.