MRCOOL DIY25-3858C-O DIY 5th Gen 25-foot Line Set is a pre-charged refrigerant connection kit designed for compatible 24K–36K BTU ductless mini-split systems using R-454B refrigerant. It includes 3/8-inch and 5/8-inch copper lines with Pro Cable for connecting the indoor air handler to the outdoor condenser. The line set circulates refrigerant between system components, supporting eff... https://www.partshnc.com/mrcool-diy-5th-gen-25ft-3-8-x-5-8-line-set-r-454b-diy25-3858c-o