Parker PEFR Series polyethylene tubing are excellent flame resistant units designed for use in weld spatter / spark environments and pneumatic controls in HVAC systems. These units are made of linear low density polyethylene (LLDPE) to provide greater resistance to stress cracking due to chemicals, soaps, solvents or oils. They are compliant with UL 94 V-2 and ASTM D-1693 standards and are available in 100, 140, 155 and 185 PSI operating pressures.