Marketing InformationThis 3/8 in OD x 1/4 in OD AquaLock™ mini reducing coupling works with plastic or soft copper tubing. It is easy-to-install, no tools or tube inserts are required. The fitting can be used for hot and cold water applications. The unique O-ring guide feature provides a zero-leak connection. Unlike barb fittings, this fitting joins the tubing on the outside, increasing the flow capacity. After a connection has been made even under maximum pressure, the tubing is able to swivel, making the fitting ideal for vibrating and dynamic applications.