The Watts PL-3028 Tube Elbow is a plastic fitting designed for use in heating, cooling, and air systems. With a 90-degree angle and a pressure rating of 150 psi, this elbow is suitable for connecting tubes with a 3/8 inch diameter and 1/4 inch diameter. The Watts brand is known for its quality and reliability, making this tube elbow a dependable choice for various plumbing and HVAC applications.