We have John Guest Male Elbow 3/8" X 1/4" Male, we carry most John Guest parts. This quick connect piece is easy to install, the tubing is inserted into the quick connect and locked into place. Connecting and disconnecting is a breeze with the push-fit connections that come with these pieces. Plastic is rated food grade. These fittings are for water and reverse osmosis applications, they are not to be used with gas, pneumatic pressure, or vacuum applications.