The MRCOOL MC16-1438 is a 16-foot mini split line set flared connection kit designed for 9K and 12K BTU ductless mini split systems. It provides the refrigerant piping needed to connect the indoor evaporator unit with the outdoor condenser, using 1/4-inch and 3/8-inch copper lines with flared connections for secure refrigerant flow. The kit helps simplify installation, reduce connecti... https://www.partshnc.com/mrcool-mc16-1438