The Thermo-Split 3/8" air conditioner copper tube with a 9mm coating is a premium, pre-insulated refrigerant line designed for mini-split and central air systems. Built for high pressure and thermal efficiency, it simplifies installation and prevents energy loss. Tube Diameter: 3/8" (9.52 mm) outer diameter, typically used for the liquid line on larger ACs or suction lines on smaller units. Material: High-purity, soft, phosphorus-deoxidized seamless copper (Cu-DHP 99.9%). Coating Thickness: 9 mm extruded, closed-cell polyethylene (PE) thermal insulation. Refrigerant Compatibility: Rated for modern gases like R-32 and R-410A.

Air conditioner copper tube, Thermo-Split, 3/8", 9mm coating