FloraFlex 16-17mm Double Layer TubingKeep irrigation clean with double layer tubing that blocks light, reduces heat, and prevents algae buildup. The FloraFlex 16 17mm Double Layer Tubing is engineered to keep your irrigation system cool, clean, and efficient. The white outer layer reflects light and reduces heat buildup, while the black inner layer completely blocks light to prevent algae growth and maintain a clean water flow. Made from BPA and lead free polyethylene, this tubing is