The MRCOOL DIY50-3858C DIY 4th Gen 24K–36K BTU Connection Line Set is a 50-foot refrigerant line set designed for compatible MRCOOL DIY ductless mini-split heat pump systems. Featuring 3/8-inch liquid and 5/8-inch suction lines, it connects the indoor and outdoor units to enable efficient refrigerant circulation during heating and cooling. Designed for DIY installations, the line set ... https://www.partshnc.com/mrcoolr-diy-line-set-diy50-3858c