The MRCOOL MC16-1438 is a 16-foot flared refrigerant line set designed for 9,000 and 12,000 BTU MRCOOL Olympus and Advantage ductless mini-split systems. It includes a 1/4-inch liquid line and 3/8-inch suction line with factory-flared ends that connect the indoor air handler to the outdoor condenser, allowing refrigerant to circulate efficiently between the units. https://www.partshnc.com/mrcool-mc16-1438