The 1-1/2 in. IPS DR 11 Underground Yellow Poly Gas Pipe Tee is an adapter fitting made of polypropylene, specifically designed in a “Tee” shape with a female thread size of 1 1/2 inches. This product is used in industrial plumbing and fixtures for gas pipe installations, providing a reliable and durable connection for underground pipelines. Its yellow color indicates its visibility and compliance with safety regulations for underground gas piping systems.