Pre-wrapped glycol only trunk line! Ready to install, save labor time at the site. Ideal for running glycol lines from power pack to walk-in cooler. Never expose any glycol lines to the air, always insulate to protect from freezing. Specifications: Type4 Glycol Glycol Lines3/8" I.D. Polyethylene Tubing Diameter. Restriction Per FootN/A Moisture Barrier WrapFood Quality barrier film Cold Transfer WrapAluminum foil wrap Insulation3/4” (19 mm) closed cell Barrier JacketNone