The John Guest ME140380 AUTO LOCK 1/4"-3/8" ELBOW - 90 , 1/4" OD X 3/8" MPT is used in many agricultural applications to provide a leak-free connection. The precision molded push-in fitting has excellent chemical resistance in a variety of uses and allows for a quick connect and disconnection without the need for tools. For use in many spraying and plumbing applications.