John Guest 1/4" Polyethylene Tubing for Drinking Water Filtration Systems (natural)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