This KegLand Duotight Push - In Fitting is great for homebrewers and professionals in the beverage industry. It's used to connect gas and beverage lines, like connecting to flared gas disconnects or CO2 regulators. With a size of 9.5 mm (3/8 in.) x 1/4 in. flare, it can handle a pressure of up to 100 psi. The double O - ring design makes it very reliable and suitable for both gas and beverage applications.