SUNPASS PTFE Fittings are a type of fluorocarbon-based polymer that come in a powdery form. These powders are mixed, preformed, and extruded into a paste, which is then transformed into tubing. PTFE Tube Fittings also known as polytetrafluoroethylene is one such type of fittings that possesses unique properties. Fittings for pipes and tubes are made with different materials depending upon the application that they are going to be used in. We offer a variety of fittings depending on the tubing diameter and the thread size.