The MRCOOL DIY50-1438C-O DIY 6K, 9K & 12K BTU Line Set with Pro Cable is a 50-foot pre-charged refrigerant line set designed for compatible MRCOOL DIY ductless mini-split systems. It includes 1/4-inch and 3/8-inch copper lines that connect the indoor air handler to the outdoor condenser, supporting efficient refrigerant circulation for heating and cooling. The integrated Pro Cable fac... https://www.partshnc.com/mrcool-diy50-1438c-o-50ft-pre-charged-mini-split-line-set