PFA tubes (perfluoroalkoxy) have excellent cracking and stress resistance and can be used when more demanding mechanical properties are required. PFA tubes are the product of choice for applications involving extremely high chemical resistance and exposure to high temperatures. If greater clarity, flexibility and higher continuous use temperatures are required, PFA tubes are preferred. PFA tubes are rigid and have a long bending life (up to 500�ºF) and have all the conventional properties of PTFE. In the semiconductor and pharmaceutical industries, PFA HP (High purity) tubing is used in fluid handling applications that require very low levels of chemically extractable matter.