MRCOOL DIY35-3858C-O DIY 5th Gen 24K & 36K BTU Line Set with Pro Cable is a pre-charged connection kit designed for compatible MRCOOL DIY mini-split systems. It works by providing sealed refrigerant lines and an integrated Pro Cable that connects the indoor and outdoor units, enabling efficient refrigerant circulation and electrical communication for cooling and heating operation. https://www.partshnc.com/mrcool-diy-5th-gen-35ft-3-8-x-5-8-line-set-r-454b-diy35-3858c-o