Polyethylene 6x4mm - LDP06/040 For a wide variety of uses in point of use water purification systems, industrial water treatment & drink dispense systems. Made from a high grade of polyethylene, the Advanced PE tubing ensures the best balance between flexibility & pressure/temperature resistance. Resistant to a wide range of aggressive chemical agents. Available in nine colours. Black tubing is UV stabilized, making it resistant to direct ultraviolet sunlight and ideal for outdoor applications. Silicone free.