Loc-Line Coolant Hose Component, Acetal Copolymer, Extended Element, 1/4" Hose ID (Pack of 4) Non-flexible straight hose extension for applications up to 110 psi when used with element clamp (sold separately) Fitting connects to Loc-Line modular hose on both ends Acetal copolymer plastic has a blue color, resists corrosion and moisture, and can be used with acetone, alcohol, ethyl, greases, oils, commercial dish detergents, gasoline, lacquer solvents, and sodium hydroxide Maximum operating temperature of 170 degrees F Material meets NSF/ANSI standards 14, 51, and 61 for drinking (potable) water