The MRCOOL MC25-3858 is a 25-foot flared copper line set designed to connect indoor and outdoor components of compatible ductless mini-split HVAC systems. It features a 3/8-inch liquid line and 5/8-inch suction line, allowing refrigerant to circulate efficiently between the air handler and condenser. This non-precharged line set is specifically compatible with MRCOOL 24K and 36K Olymp... https://www.partshnc.com/mrcool-25ft-flared-line-set-kit-mc25-3858