FEP tubing is very similar to PFA tubing in flexibility and appearance. The major difference is the service temperature range for FEP: -73 to 204°C (-100 to 400°F). Specifications Hardness, Shore D: 56 Specific Gravity: 2.15 Tensile Strength: 3400 psi Elongation at Break: 325% Brittle Temperature: <-170°C (-275°F) Service Temperature: -73 to 204°C (-100 to 400°F)