PureT USA (TU-3) PE Tubing 3/8" - Price per Roll - 500 feetPureT USA TU 3 Polyethylene Tubing 3 8" 500 foot roll of food grade PE tubing for reverse osmosis and filtration systems NSF Certified 3 8" OD 500 ft Roll John Guest Compatible The PureT TU 3 is semi rigid polyethylene tubing designed for water treatment applications where durability and chemical resistance matter. This 500 foot roll gives you enough tubing for multiple installations or service calls without the markup of buying by the foot.