Line sets and interconnecting wires for Mini Split Systems. These parts are required for a Mini Split installation. Look to the description to match the correct part for your Mini Split. All parts contain 25 ft of 14 GA/3 conductor wire x 25 ft 16 GA/2 conductor wire (shielded) in addition to the insulated copper refrigerant line. The tube diameters for both 700570 and 700574 are 1/4 in and 3/8 in. The tube diameters for both 700572 and 700576 are 1/4 in and 5/8 in. Tube diameters for both the 700566 and 700568 are 1/4 in and 1/2 in.