John Guest 1/4" X 500' LLPDE Tubing LLDPE tubing is not recommended for mineral oils, gases and fuels or high pressure compressed air/pneumatic systems. LLDPE tubing is suitable for pneumatic applications providing pressure is maximum 150 psi @ 70º F. At elevated temperatures 120º F+, mineral oil will degrade LLDPE tubing should be periodically checked and replaced if necessary.Linear low density polyethyleneSuitable for cold and intermittent hot water applicationsBroad chemical compatibilityFDA and NSF certifiedStrong, flexible and robustSold in 500' increments