ReFlex? Line Sets are used to simplify installation of HVAC split system equipment. Connecting the indoor evaporator along with the outdoor condensing unit, this system allows an easy installation without the headache of kinking copper tubing and saves on install time and labor. The ReFlex? Line Set comes pre-wired, pre-insulated and also comes with flare fitting on both ends, with an ETL listing for 800 PSI pressure test. For use with the DriFecta? Mega-Split? Air Conditioners.