John Guest 1/4" Polyethylene Tubing for Drinking Water Filtration Systems (black)ﾠ- 500 ft. roll ﾠ John Guest tubing provides the benefits of a wide range of temperature and pressure suitability, and is made from non contaminating materials. Common applications are in water purification, water conditioners, ice makers and misting systems.ﾠ ﾠ Features: Linear low density polyethylene Suitable for cold and intermittent hot water applications Broad chemical compatibility FDA and NSF certified Strong, flexible and robust Exposure to Ultraviolet Light:ﾠ John Guest Black LLDPE tubing is UV stabilized and can be exposed to direct ultraviolet light (e.g. direct sunlight); other colours of John Guest LLDPE tubing are not UV stabilized and cannot be exposed to direct ultraviolet light.