The John Guest 3/8 in. O.D. Push-to-Connect Elbow is manufactured from white polypropylene and equipped with EPDM O-rings utilizing John Guest's push-fit technology to make an easy, reliable, leak-free connection. Developed to satisfy a wide range of applications it can be used on plastic or soft copper tubing. To make a connection, the tube is inserted by hand and the unique John Guest collet locking system holds the tubing firmly in place. Disconnection is just as easy and requires no special tools.