The MRCOOL DIY35-1438C-O is a pre-charged 35-foot mini split line set designed for MRCOOL DIY 5th Generation 6K, 9K, and 12K BTU ductless mini split systems using R-454B refrigerant. It consists of insulated copper tubing that transfers refrigerant between the indoor air handler and outdoor condenser, enabling efficient heating and cooling operation. The pre-charged design simplifies ... https://www.partshnc.com/mrcoolaccessory-5th-gen-pre-charged-mini-split-line-set-diy35-1438c-o