1.Non-toxic 2.Corrosion Resistant 3.Low Flow Resistance 4.Excellent Flexibility 5.Easy installation High Quality, Better Price, Best ServicesAdvantages1.Non-toxic: no heavy metal additives ,would not be covered with dirt or contaminated by bacterium2.Corrosion Resistant: resist chemical matters and electron chemical corrosion3.Low Flow Resistance: smooth interior walls and low friction4.Excellent ...